Northrop Grumman Private/Proprietary Level I
Sperry Marine
Speed Log Systems
Product Overview
Uwe Oldekop
Product Line Manager
Contents
• Speed Log Operating Principle
• Control & Display Units
• Electronic Unit
• EM Sensors / Doppler Transducer
• Speed Log Systems
• Speed Log Retrofit Solutions
• Speed Log Accessories
Northrop Grumman Private/Proprietary Level I
Contents (cont.)
● NAVIKNOT Speed Logs Key Highlights
● Inst. Location of EM Sensors / Doppler Transducer
● Carriage Requirements
● Definitions & Abbreviations
Northrop Grumman Private/Proprietary Level I
Navigating in the 21st Century…
The NAVIKNOT Multisensor Speed Log
Series utilizes satellite-based
technology (GPS) in addition to the
traditional electromagnetic sensors and
Doppler transducers to provide highaccuracy displays of:
• Dual-axis ground speed
and
• Single-axis water speed
Northrop Grumman Private/Proprietary Level I
Speed Log Operating Principle
Electromagnetic Sensor
Operating Principle (Single-Axis Water Speed)
The electromagnetic sensor houses a coil which, when energized with an AC
current, produces a magnetic field around the sensor in the surrounding water. The
ship’s motion through the water produces an electrical field (E) perpendicular to the
magnetic field (B) and the ship’s motion (V). The resulting signal is picked up by the
sensor electrodes and fed to the preamplifier where it is converted into a digital
format and transmitted to the NAVIKNOT electronics unit.
EM Sensor
Type NF
EM Sensor
Type FNF
Northrop Grumman Private/Proprietary Level I
Doppler Transducer
Operating Principle (Single-Axis Water Speed)
The Doppler transducer utilizes the Doppler frequency shift effect to determine the speed
of a vessel through water. The transducer emits 2Mhz frequency sound pulses in the fore
and aft directions through two transmitter windows. Two receiver windows in the
transducer detect the return echo of the sound pulses. A time delay between pulse
transmissions ensures that echoes are received from the undisturbed water outside the
vessel’s boundary layer. The signals are processed to determine the ship’s fore/aft speed
vector. The preamplifier transmits the speed information in a digital format to the
NAVIKNOT electronics unit.
Gate Valve
Transducer
Tank Mount
Transducer
Northrop Grumman Private/Proprietary Level I
Satellite Sensor
Operating Principle (Dual-Axis Ground Speed)
The satellite sensor makes use of GPS satellite signals to determine a ship’s longitudinal and
transverse ground speeds. A dual antenna unit with two GPS receivers and three rate gyros
integrated in an electronics unit determine a vessel’s heading, velocity and course.
While the heading is referenced to the ship’s fore-and-aft line,
represent the motion vector, i.e. the magnitude
and direction of motion over ground. The
information received from the satellites is
processed in the electronics unit, which resolves
the velocity data into the ship’s longitudinal and
transverse ground speeds.
The speed vectors combined with the rate-of-turn
data are used to discern between translational and
rotational movement of the vessel. These are used
to determine the bow and stern transverse speeds
shown in the docking display.
Northrop Grumman Private/Proprietary Level I
the velocity and course
Control & Display Units
Control & Display Units
Display 2x1 CDU (192 x 96mm)
•
350 E
•
450 D
•
350 EE (retrofit solution)
•
450 DD (retrofit solution)
Display 3x1 CDU (288 x 96mm)
•
600 S
•
600 SE
•
600 SD
•
550 DD (retrofit solution)
•
600 SDD (retrofit solution)
•
600 SDT (retrofit solution)
10
Northrop Grumman Private/Proprietary Level I
Control & Display Units (cont.)
Display Colour Versions
White
Blue
Black
(night version)
• Colours are selectable via set-up
• Quick adjustable display colour change to day and night mode
Northrop Grumman Private/Proprietary Level I
Control & Display Units (cont.)
Display Examples (single axis)
350 E
450 D
SOG
n.a.
n.a.
n.a.
n.a.
Docking
n.a.
n.a.
n.a.
n.a.
GPS
n.a.
n.a.
n.a.
n.a.
350 EE*
450 DD*
STW
* Retrofit solutions
Northrop Grumman Private/Proprietary Level I
Control & Display Units (cont.)
Display Examples (dual axis)
600 S
600 SE
600 SD
550 DD*
STW
STW
n.a.
SOG
Docking
n.a.
GPS
n.a.
* Retrofit solutions
Northrop Grumman Private/Proprietary Level I
600 SDD*
600 SDT*
Electronic Unit
Electronics Unit
Housing Electronics Unit
•
350 E
•
450 D
•
350 EE (retrofit solution)
•
450 DD (retrofit solution)
•
550 DD (retrofit solution)
•
600 S
•
600 SE
•
600 SD
•
600 SDD (retrofit solution)
•
600 SDT (retrofit solution)
Northrop Grumman Private/Proprietary Level I
EM Sensors / Doppler Transducer
NAVIKNOT Speed Logs
Sensors/Transducer
Electromagnetic Sensors
• NF – Flush-Fitted Sensor (30m cable) with Gate Valve for Steel Hulls
• FNF III – Sensor (30m cable) for External Installation in Steel and Aluminium Hulls
• FNF I – Sensor (20m cable) for Yachts 35 Knots for Steel and Aluminium Hulls
NF
• FNF I – Sensor (20m cable) for Yachts 60 Knots for Steel and Aluminium Hulls
• FNF II – Sensor (20m cable) for Yacht s35 Knots for Wooden and Fibreglass Hulls
FNF
Doppler Transducer
• Doppler Transducer (gate valve) with 18m,40m and 60m cable
• Doppler Transducer (gate valve) with 40m cable (only for retrofit version NK 600 SDD)
• Doppler Transducer (tank mount) with 40m and 60m cable (only for retrofit version NK 600 SDT
Antenna
• Dual Satellite Antenna with 50m and 75m cable
Northrop Grumman Private/Proprietary Level I
Doppler
Speed Log Systems
Overview
NAVIKNOT 350 E Electromagnetic - Single-Axis Water Speed
Control & Display Unit
Electronics Unit
NF
Preamplifier
EM Sensors
FNF
NAVIKNOT 450 D Doppler - Single-Axis Water Speed
Doppler Sensors
Control & Display Unit
Electronics Unit
Gate Valve
Preamplifier
Transducer
NAVIKNOT 600 S Satellite - Dual-Axis Ground Speed
Control & Display Unit
Electronics Unit
Satellite Antenna
NAVIKNOT 600 SE Satellite & Electromag. – Dual-Axis Ground Speed & Single-Axis Water Speed
EM Sensors
Control & Display Unit
Electronics Unit
Satellite Antenna
Preamplifier
NF
FNF
NAVIKNOT 600 SD Satellite & Doppler – Dual-Axis Ground Speed & Single-Axis Water Speed
Doppler Sensors
Control & Display Unit
Electronics Unit
Satellite Antenna
Preamplifier
Northrop Grumman Private/Proprietary Level I
Gate Valve
Transducer
NAVIKNOT Speed Log 350 E
Single-Axis Water Speed
Master CDU
(Succeeds NAVIKNOT III)
for console mounting
(front panel IP 65)
or
Preamplifier
mounted in frame (IP 23)
or
with housing in bracket (IP 65)
Electronics Unit
Remote CDU (optional)
for console mounting
(front side IP 65)
or
or
mounted in frame (IP 23)
or
NF
FNF I, II, III
with housing in bracket (IP 65)
EM Sensors
Northrop Grumman Private/Proprietary Level I
NAVIKNOT Speed Log 350 E
In- and Outputs
Electronics Unit
NAVIKNOT
Analogue Voltage
Analogue Current
Central Alarm Management
CDU
Remote CDU
(option)
Pulse 1 to 5
Pulse 6 / Mute Out
18 – 36 VDC
Double-End Ferry Mode
Ext. DIM Ext. DIM+
Mute In
RS422 Central DIM
EM
Sensor
Preamplifier
Northrop Grumman Private/Proprietary Level I
Interface
PCB
RS 422 Out 1 to 6
Watch Alarm
Speed Limit
Power Fail
Speed Log Fail
NAVIKNOT Speed Log 450 D
Single-Axis Water Speed
(Succeeds NAVIKNOT 400)
Master CDU
for console mounting
(front panel IP 65)
or
Preamplifier
mounted in frame (IP 23)
or
with housing in bracket (IP 65)
Electronics Unit
Remote CDU (optional)
for console mounting
(front panel IP 65)
Gate Valve
or
mounted in frame (IP 23)
or
with housing in bracket (IP 65)
Doppler
Transducer
Northrop Grumman Private/Proprietary Level I
NAVIKNOT Speed Log 450 D
In- and Outputs
Electronics Unit
NAVIKNOT
Analogue Voltage
Analogue Current
Central Alarm Management
CDU
Remote CDU
(option)
Pulse 1 to 5
Pulse 6 / Mute Out
18 – 36 VDC
Double-End Ferry Mode
Ext. DIM Ext. DIM+
Mute In
RS422 Central DIM
Doppler
Transducer
Preamplifier
Northrop Grumman Private/Proprietary Level I
Interface
PCB
RS 422 Out 1 to 6
Watch Alarm
Speed Limit
Power Fail
Speed Log Fail
NAVIKNOT Speed Log 600 S
Dual-Axis Ground Speed
Master CDU
for console mounting (IP 23)
or
Dual Satellite
Antenna
mounted in frame (IP 23)
or
with housing in bracket (IP 23)
Remote CDU (optional)
3x1 for console mounting (IP 23)
2x1 for console mount. (IP 65)
3x1 mounted in frame (IP 23)
Electronics Unit
2x1 mounted in frame (IP 23)
3x1 with housing in bracket (IP 23)
2x1 w. housing in
bracket (IP 65)
Northrop Grumman Private/Proprietary Level I
NAVIKNOT Speed Log 600 S
Electronics Unit
NAVIKNOT
In- and Outputs
SAT
CPU
Dual Satellite
Antenna
CDU
Analogue Voltage
Analogue Current
Central Alarm Management
Remote CDU
(option)
Pulse 1 to 5
18 – 36 VDC
Double-End Ferry Mode
Ext. DIM Ext. DIM+
Mute In
RS422 Central DIM
Northrop Grumman Private/Proprietary Level I
Interface
PCB
Pulse 6 / Mute Out
RS 422 Out 1 to
6
Watch Alarm
Speed Limit
Power Fail
Speed Log Fail
NAVIKNOT Speed Log 600 SE
Single-Axis Water and Dual-Axis Ground Speed
Master CDU
for console mounting (IP 23)
Dual Satellite
Antenna
or
mounted in frame (IP 23)
Preamplifier
or
with housing in bracket (IP 23)
Remote CDU (optional)
3x1 for console mounting (IP 23)
Electronics Unit
2x1 for console mount. (IP 65)
3x1 mounted in frame (IP 23)
or
2x1 mounted in frame (IP 23)
3x1 with housing in bracket (IP 23)
NF
FNF I, II, III
EM Sensors
2x1 w. housing in
bracket (IP 65)
Northrop Grumman Private/Proprietary Level I
NAVIKNOT Speed Log 600 SE
Electronics Unit
NAVIKNOT
In- and Outputs
Dual Satellite
Antenna
SAT
CPU
CDU
Analogue Voltage
Analogue Current
Central Alarm Management
Remote CDU
(option)
Pulse 1 to 5
Pulse 6 / Mute Out
18 – 36 VDC
Double-End Ferry Mode
Ext. DIM Ext. DIM+
Mute In
RS422 Central DIM
EM
Sensor
Preamplifier
Northrop Grumman Private/Proprietary Level I
Interface
PCB
RS 422 Out 1 to 6
Watch Alarm
Speed Limit
Power Fail
Speed Log Fail
NAVIKNOT Speed Log 600 SD
Single-Axis Water and Dual Axis-Ground Speed
Master CDU
Dual Satellite
Antenna
for console mounting (IP 23)
or
Preamplifier
mounted in frame (IP 23)
or
with housing in bracket (IP 23)
Remote CDU (optional)
3x1 for console mounting (IP 23)
Electronics Unit
2x1 for console mount. (IP 65)
Gate Valve
3x1 mounted in frame (IP 23)
2x1 mounted in frame (IP 23)
3x1 with housing in bracket (IP 23)
Doppler
Transducer
2x1 w. housing in
bracket (IP 65)
Northrop Grumman Private/Proprietary Level I
NAVIKNOT Speed Log600 SD
Electronics Unit
NAVIKNOT
In- and Outputs
Dual Satellite
Antenna
SAT
CPU
CDU
Analogue Voltage
Analogue Current
Central Alarm Management
Remote CDU
(option)
18 – 36 VDC
Double-End Ferry Mode
Ext. DIM Ext. DIM+
Mute In
RS422 Central DIM
Doppler
Transducer
Preamplifier
Northrop Grumman Private/Proprietary Level I
Pulse 1 to 5
Pulse 6 / Mute Out
Interface
PCB
RS 422 Out 1 to 6
Watch Alarm
Speed Limit
Power Fail
Speed Log Fail
Speed Log Retrofit Solutions
Overview Retrofit Solutions
NAVIKNOT 350 EE EM, Retrofit Kit
Single-Axis Water Speed
NAVIKNOT II EM
Single-Axis Water Speed
NAVIKNOT 350 EE EM, Retrofit Kit
Single-Axis Water Speed
NAVIKNOT III, EM 200, DEBEG 4675 EM
Single-Axis Water Speed
NAVIKNOT III D, NAVIKNOT 400 D,
EM 200 D Doppler
Single-Axis Water Speed
SRD 331 Doppler
Single-Axis Water Speed
SRD 500 Doppler
Dual-Axis Ground Speed,
Dual-Axis Water Speed
SRD 500, SRD421 Doppler
Dual-Axis Ground Speed,
Dual-Axis Water Speed
SRD 500, SRD421 Doppler
Dual-Axis Ground Speed,
Dual-Axis Water Speed
NAVIKNOT 450 DD Doppler , Retrofit Kit
Single-Axis Water Speed
NAVIKNOT 450 DD Doppler , Retrofit Kit
Single-Axis Water Speed
NAVIKNOT 550 DD Doppler , Retrofit Kit
Dual-Axis Ground Speed
Dual-Axis Water Speed
NAVIKNOT 600 SDD Doppler , Retrofit Kit
Dual-Axis Ground Speed
Single-Axis Water Speed
NAVIKNOT 600 SDT Doppler , Retrofit Kit
Dual-Axis Ground Speed
Single-Axis Water Speed
31
Northrop Grumman Private/Proprietary Level I
Retrofit Solutions
350 EE, 450 DD and 550 DD
The NAVIKNOT 350 EE package retrofits the former NAVIKNOT II, NAVIKNOT III, EM 200 and
DEBEG 4675 Single-Axis Electromagnetic log display unit with the NAVIKNOT Electronics Unit
5003 and 2x1 CDU.
The existing electromagnetic sensor and electronics unit remain in place; functionality and
performance are identical to the NAVIKNOT II, NAVIKNOT III, EM 200 and DEBEG 4675.
The NAVIKNOT 450 DD package retrofits the former NAVIKNOT III D, NAVIKNOT 400, EM 200 D
and SRD 331 Single-Axis Doppler log display unit with the NAVIKNOT Electronics Unit 5003 and
2x1 CDU.
The existing Doppler transducer and electronics unit remain in place; functionality and performance
are identical to the NAVIKNOT III D, NAVIKNOT 400, EM 200 D and SRD 331 system.
The NAVIKNOT 550 DD package retrofits the former SRD 500 Dual-Axis Doppler log display unit
with the NAVIKNOT Electronics Unit 5003 and 3x1 CDU.
The existing Doppler transducer and electronics unit remain in place; functionality and performance
are identical to the SRD 500 system.
Northrop Grumman Private/Proprietary Level I
Retrofit Solutions (cont.)
600 SDD and 600 SDT
The NAVIKNOT 600 SDD package retrofits the complete former SRD 500 Dual-Axis Doppler
log with all its components.
Only the existing gate valve remains in place; functionality and performance are identical to
the SRD 500 system except transversal water speed.
The NAVIKNOT 600 SDT package retrofits the complete former SRD 500 Dual-Axis Doppler
log with all its components.
Only the existing cofferdam remains in place; functionality and performance are identical to
the SRD 500 system except transversal water speed.
Northrop Grumman Private/Proprietary Level I
NAVIKNOT Speed Log 350 EE
Retrofit of NAVIKNOT II
34
Northrop Grumman Private/Proprietary Level I
NAVIKNOT Speed Log 350 EE
Retrofit of NAVIKNOT II
Single-Axis Water Speed
Master CDU
for console mounting
(front panel IP 65)
Defective Orig.
Display
or
mounted in frame (IP 23)
or
Preamplifier
with housing in bracket (IP 65)
Preamplifier
Electronics Unit
Remote CDU (optional)
for console mounting
(front panel IP 65)
or
or
new
EM Sensor
old
mounted in frame (IP 23)
with housing in bracket (IP 65)
Northrop Grumman Private/Proprietary Level I
NAVIKNOT Speed Log 350 EE
In- and Outputs
Electronics Unit
NAVIKNOT
Analogue Voltage
Analogue Current
CDU
Central Alarm Management
Remote CDU
(option)
Pulse 1 to 5
Pulse 6 / Mute Out
18 – 36 VDC
Double-End Ferry Mode
Ext. DIM Ext. DIM+
Interface
PCB
Mute In
RS422 Central DIM
EM
Sensor
Preamplifier
Northrop Grumman Private/Proprietary Level I
RS 422 Out 1 to 6
Watch Alarm
Speed Limit
Power Fail
Speed Log Fail
NAVIKNOT Speed Log 350 EE
Retrofit of Display Unit for NAVIKNOT III, EM 200, DEBEG 4675
Northrop Grumman Private/Proprietary Level I
NAVIKNOT Speed Log 350 EE
Retrofit of Display Unit for NAVIKNOT III, EM 200, DEBEG 4675
Single-Axis Water Speed
Master CDU
Defective Orig.
Display
for console mounting
(front panel IP 65)
or
Terminal
Board
mounted in frame (IP 23)
or
with housing in bracket (IP 65)
Preamplifier
Electronics Unit
Remote CDU (optional)
for console mounting
(front panel IP 65)
or
new
EM Sensor
old
mounted in frame (IP 23)
or
with housing in bracket (IP 65)
NAVIKNOT Speed Log 350 EE
In- and Outputs
Electronics Unit
NAVIKNOT
Analogue Voltage
Analogue Current
CDU
Central Alarm Management
Remote CDU
(option)
Pulse 1 to 5
Pulse 6 / Mute Out
18 – 36 VDC
Double-End Ferry Mode
Ext. DIM Ext. DIM+
Mute In
RS422 Central DIM
EM
Sensor
Preamplifier
Northrop Grumman Private/Proprietary Level I
Interface
PCB
RS 422 Out 1 to 6
Watch Alarm
Speed Limit
Power Fail
Speed Log Fail
NAVIKNOT Speed Log 450 DD
Retrofit of Display Unit for NAVIKNOT III D, NAVIKNOT 400, EM 200 D
40
Northrop Grumman Private/Proprietary Level I
NAVIKNOT Speed Log 450 DD
Retrofit of Display Unit for NAVIKNOT III D, NAVIKNOT 400, EM 200 D
Single-Axis Water Speed
Master CDU
Defective Orig.
Display
for console mounting
(front panel IP 65)
or
Terminal
Board
mounted in frame (IP 23)
or
Electronics
Unit
with housing in bracket (IP 65)
Electronics Unit
Remote CDU (optional)
for console mounting
(front panel IP 65)
or
or
Gate
Valve
new
old
mounted in frame (IP 23)
or
Tank
Mount
with housing in bracket (IP 65)
Northrop Grumman Private/Proprietary Level I
NAVIKNOT Speed Logs 450 DD
In- and Outputs
Electronics Unit
NAVIKNOT
Analogue Voltage
Analogue Current
Central Alarm Management
CDU
Remote CDU
(option)
Pulse 1 to 5
Pulse 6 / Mute Out
18 – 36 VDC
Double-End Ferry Mode
Ext. DIM Ext. DIM+
Mute In
RS422 Central DIM
SRD 331
Sensor
SRD 331
Electronics
Unt
Northrop Grumman Private/Proprietary Level I
Interface
PCB
RS 422 Out 1 to 6
Watch Alarm
Speed Limit
Power Fail
Speed Log Fail
NAVIKNOT Speed Log 450 DD
Retrofit of Display Unit for SRD 331
Northrop Grumman Private/Proprietary Level I
NAVIKNOT Speed Log 450 DD
Retrofit of Display Unit for SRD 331
Single-Axis Water Speed
Master CDU
for console mounting
(front panel IP 65)
Defective Orig.
Display
or
mounted in frame (IP 23)
or
Electronics
Unit
with housing in bracket (IP 65)
Electronics Unit
Remote CDU (optional)
for console mounting
(front panel IP 65)
or
or
Gate
Valve
Tank
Mount
new
old
mounted in frame (IP 23)
or
with housing in bracket (IP 65)
Northrop Grumman Private/Proprietary Level I
NAVIKNOT Speed Log 450 DD
In- and Outputs
Electronics Unit
NAVIKNOT
CDU
Analogue Voltage
Analogue Current
Central Alarm Management
Remote CDU
(option)
Pulse 1 to 5
Pulse 6 / Mute Out
18 – 36 VDC
Double-End Ferry Mode
Ext. DIM Ext. DIM+
Mute In
RS422 Central DIM
SRD 331
Sensor
SRD 331
Electronics
Unt
45
Northrop Grumman Private/Proprietary Level I
Interface
PCB
RS 422 Out 1 to 6
Watch Alarm
Speed Limit
Power Fail
Speed Log Fail
NAVIKNOT Speed Log 550 DD
Retrofit of Display Unit for SRD 500
46
Northrop Grumman Private/Proprietary Level I
NAVIKNOT Speed Logs 550 DD
Retrofit of Display Unit for SRD 500
Dual-Axis Ground Speed and Dual-Axis Water Speed
Master CDU
for console mounting (IP 23)
or
Defective Orig.
Display
mounted in frame (IP 23)
or
with housing in bracket (IP 23)
new
old
Electronics
Unit
Electronics Unit
or
Gate
Valve
Tank
Mount
Existing Repeater SSD12,
SSD 22 and Remote
Docking Displays DIP 10
can be operated
Northrop Grumman Private/Proprietary Level I
Remote CDU (optional)
NAVIKNOT Speed Log 550 DD
In- and Outputs
Electronics Unit
NAVIKNOT
Analogue Voltage
Analogue Current
Central Alarm Management
CDU
Remote CDU
(option)
Pulse 1 to 5
Pulse 6 / Mute Out
18 – 36 VDC
Double-End Ferry Mode
Ext. DIM Ext. DIM+
Mute In
RS422 Central DIM
SRD 500
Sensor
SRD 500
Electronics
Unt
Northrop Grumman Private/Proprietary Level I
Interface
PCB
RS 422 Out 1 to 6
Watch Alarm
Speed Limit
Power Fail
Speed Log Fail
NAVIKNOT Speed Log 600 SDD
Retrofit for SRD 500, SRD 421 (Gate Valve)
Northrop Grumman Private/Proprietary Level I
NAVIKNOT Speed Log 600 SDD
Retrofit for SRD 500, SRD 421 (Gate Valve)
Master CDU
Dual-Axis Ground Speed
and Single-Axis Water
Speed
Dual Satellite
Antenna
for console mounting (IP 23)
or
mounted in frame (IP 23)
or
with housing in bracket (IP 23)
Electronics Unit
new
Replacement
Single Axis
Doppler
Transducer built
into an adapter to
fit into the
existing SRD 500
gate valve
old
Existing
Repeater SSD12, SSD 22
and Remote Docking
Displays DIP 10
Northrop Grumman Private/Proprietary Level I
Remote CDU (optional)
NAVIKNOT Speed Log 600 SDD
In- and Outputs
Electronics Unit
NAVIKNOT
Dual Satellite
Antenna
SAT
CPU
CDU
Analogue Voltage
Analogue Current
Central Alarm Management
Remote CDU
(option)
18 – 36 VDC
Double-End Ferry Mode
Ext. DIM Ext. DIM+
Mute In
RS422 Central DIM
Doppler
Transducer
Preamplifier
Pulse 1 to 5
Pulse 6 / Mute Out
Interface
PCB
RS 422 Out 1 to 6
Watch Alarm
Speed Limit
Power Fail
Speed Log Fail
NAVIKNOT Speed Log 600 SDT
Retrofit for SRD 500, SRD 421 (Tank Mount)
Northrop Grumman Private/Proprietary Level I
NAVIKNOT Speed Log 600 SDT
Retrofit for SRD 500, SRD 421 (Tank Mount)
Dual-Axis Ground Speed
and Single-Axis
Water Speed
Master CDU
Dual Satellite
Antenna
for console mounting (IP 23)
or
mounted in frame (IP 23)
or
with housing in bracket (IP 23)
Remote CDU (optional)
Electronics Unit
new
Replacement
Single Axis
Doppler
Transducer to
come with an
adapter to fit into
the existing
SRD 500 cofferdam
old
Existing
Repeater SSD12, SSD 22
and Remote Docking
Displays DIP 10
NAVIKNOT Speed Log 600 SDT
Electronics Unit
NAVIKNOT
In- and Outputs
Dual Satellite
Antenna
SAT
CPU
CDU
Analogue Voltage
Analogue Current
Central Alarm Management
Remote CDU
(option)
18 – 36 VDC
Double-End Ferry Mode
Ext. DIM Ext. DIM+
Mute In
RS422 Central DIM
Doppler
Transducer
Preamplifier
Northrop Grumman Private/Proprietary Level I
Pulse 1 to 5
Pulse 6 / Mute Out
Interface
PCB
RS 422 Out 1 to 6
Watch Alarm
Speed Limit
Power Fail
Speed Log Fail
Speed Log Accessories
Speed Log Accessories
Universal Digital Repeater (UDR)
• Console mounting and housing with bracket
• -5 to +60 kn
Advantages of UDRs:
96x96 mm
•
Speed limit switch for rudder
angel limitation
•
Display changeable
Remote dimmer Kit available
158x155mm
Northrop Grumman Private/Proprietary Level I
Speed Log Accessories (cont.)
UDR Display Examples
Northrop Grumman Private/Proprietary Level I
Speed Logs Accessories (cont.)
Analogue Speed Indicators
Console Versions
96 x 96 mm
144 x 144 mm
-5 to +25 kn
-5 to +40 kn
-5 to +60 kn
192 x 192 mm
-5 to +25 kn
-5 to +40 kn
-5 to +25 kn
Watertight Housing with Mounting Bracket
144 x 144 mm
-5 to +25 kn
Speed Logs Accessories (cont.)
Remote Docking Display *
DIP 10
DIP 10-WP-FAN
DIP 10-BW-FAN
144 x 144 mm
w/ watertight mounting frame
w/ housing and bracket
Remote Dimmer Kit
* to be used in conjunction with NAVIKNOT 600 series only
Key Highlights
Key Highlights
●
●
●
●
●
●
●
Suitable for all types of vessels ranging
from small pleasure craft to the largest
crude carriers
●
Speed limit switch for rudder angel
limitation
●
Seriell alarm interface (CAM)
●
Seriell diming
●
Separate damping for display and outputs
(0-99 sec.)
●
Provision for master and remote control
and display units
●
Integrated take-over function Remote-toMaster
●
Miles counter (one total counter and one
daily counter)
Simple and low-cost installation
Speed accuracy + 1% or 0.1 kn whichever
is greater
Large colour TFT display
Calibration of replacement sensors
unnecessary
Varied selection of speed and distance
interfaces
Double-end ferry mode
Northrop Grumman Private/Proprietary Level I
Key Highlights (cont.)
●
Mute function, mute out for Watch Alarm
according to DNV
●
Console-mounted and bracket-mounted
versions
●
Display colours selectable by the operator
●
Type approved by Germanischer Lloyd to
MED 96/98/EC
●
Displays transverse and longitudinal speed
over ground (600 S, 600 SE, 600 SD, 600
SDD, 600 SDT, 550 DD)
●
Support of docking manoeuvres by
displaying the rate of turn, heading, course
over ground, longitudinal speed over
ground and bow and stern transverse
speed over ground (600S, 600SE, 600SD,
600 SDD, 600 SDT)
Northrop Grumman Private/Proprietary Level I
Installation Location of
EM Sensors / Doppler Transducer
Speed Log Systems
Inst. Location of the EM Sensor
Principal Requirements
Below every vessel moving through the water, there is a wedge-shaped boundary layer,
within which the flow speed is lower than the vessel’s actual speed through the water.
Directly at the hull surface, the flow speed is zero. Away from the hull, the flow speed
increases until it reaches the actual speed at the outer edge of the boundary layer.
The boundary layer is just a few millimeter thick at the vessel's bow, increasing to over
one meter at the stern. Marine growth on the underwater hull increases its thickness. In
addition, areas of turbulence may form within the boundary layer under certain
conditions (e.g. speed, draught, depth of water, state of sea) or due to marine growth
or the presence of outboard openings.
For ships with bulbous bows, the sensor is to be installed between 1.5 and 5 meter
from the front of the bow. If the sensor is positioned less than 1.5 meter from the front
of the bow, air bubbles will falsify the speed readings. If the sensor is positioned more
than 5 metres from the front of the bow, the boundary layer may be too thick.
64
Northrop Grumman Private/Proprietary Level I
Speed Log Systems
Inst. Location of the Doppler Transducer
Principal Requirements
While the transducer is mounted flush with the hull, it is not affected by boundary layer
effects, because return echoes are received from undisturbed water outside the boundary
layer at the hull.
However, in common with other sonar devices, the performance of transducer is adversely
affected by aeration. Air bubbles block acoustic energy from either being transmitted to the
water or being received by echoes from reflectors in the water. If enough acoustic energy is
blocked, the speed log operation will be erratic and unreliable. Proper speed log operation
depends upon a transducer location that provides a clear sonar path in water that is free from
sound blocking air bubbles.
Typical causes for aeration are, e.g., bow wave sweep down, cavitation from hull cavities such
as bow thruster tunnels, water in- and outlets and cavitation from hull protrusions such as
hull zincs, rivets, weld beads, etc.
The transducer is to be installed as close to the forward perpendicular of the bow as possible.
The maximum aft distance from the forward perpendicular
for a flush mounted transducer is 12 metres.
65
Northrop Grumman Private/Proprietary Level I
Speed Log Systems
Inst. Location of the EM Sensor / Doppler Transducer
Determining the Installation Location
Once possible transducer locations have been determined, contact
Sperry Marine Application Engineering to obtain location approval.
Include drawings of the vessel that show the shape of the bow and that have
legible frame numbers and frame spacing.
Typical drawings to provide include general arrangement drawings, lines
drawings, cross sectional drawings and plan view drawings.
Contact: apps.de@sperry.ngc.com
66
Northrop Grumman Private/Proprietary Level I
Carriage Requirements
Carriage Requirements
Overview for Speed Log Systems acc. to SOLAS
Ships
< 300GT
Ships
=/> 300 GT
all Passenger Ships
< 50.000 GT
NAVIKNOT 350E FNF III
X
X
X
NAVIKNOT 350E NF
X
X
X
NAVIKNOT 350E FNF I-Yacht
X
X
X
NAVIKNOT 350E FNF II-Yacht
X
X
X
NAVIKNOT 450D sea valve
X
X
X
NAVIKNOT 600S
X
NAVIKNOT 600SE FNF III
X
X
X
NAVIKNOT 600SE NF
X
X
X
NAVIKNOT 600SE FNF I-Yacht
X
X
X
NAVIKNOT 600SE FNF II-Yacht
X
X
X
NAVIKNOT 600SD sea valve
X
X
X
Speed Log Type
all Ships
>/= 50.000 GT
see Note
Note:
According to SOLAS V Reg. 19.2.3.4 and V/19.2.9.2, ships of 50.000 gross tonnage and upwards to be fitted
with a speed and distance device measuring speed through water (V/19.2.3.4) and, in addition, a speed and
distance device measuring speed over the ground in forward and afthwartships direction (V/19.2.9.2). The
above need to be fulfilled by TWO SEPARATE and INDEPENDENT DEVICES. (1x Speed over ground, 1x
Speed through water).
Northrop Grumman Private/Proprietary Level I
Carriage Requirements (cont.)
SOLAS related Notes:
The Chapter V - Safety of Navigation - of the IMO SOLAS (Safety Of Life At Sea) regulations
includes the following requirements in regulation 19:
Paragraph 2.3
All ships of 300 gross tonnage and upwards and passenger ships irrespective of size
shall be fitted with:
•
A speed and distance measuring device, or other means, to indicate
speed and distance through the water;
Paragraph 2.9
All ships of 50.000 gross tonnage and upwards shall have in addition to paragraph 2.3:
•
A speed and distance measuring device, or other means, to indicate
speed and distance over the ground in the forward and athwart ships
direction (additionally please see also Note on previous page).
Northrop Grumman Private/Proprietary Level I
Carriage Requirements (cont.)
Classification related Notes:
1) According to DnV Naut-AW speed over ground is required for all sizes of ships and additional
indicators for the navigational workstation and the bridge wings are mandatory.
2) According to LR an additional indicator for the navigational workstation is mandatory.
3) According to GL NAV and NAV-INS ships of 10.000 gross tonnage and upwards to be fitted with
a speed and distance device measuring speed through water and, in addition, a speed and
distance device measuring speed over the ground in forward and afthwartships direction. The
above need to be fulfilled by TWO SEPARATE and INDEPENDENT DEVICES. (1x Speed over
ground, 1x Speed through water).
Northrop Grumman Private/Proprietary Level I
Definitions & Abbreviations
Definition & Abbreviations
72
Speed Log:
Device to determine the speed of ships/vessels
Doppler Log:
Speed Log based on Doppler Effect
EM-Log:
Electromagnetic (Speed) Log
SAT-Log:
Satellite (Speed) Log
SOG:
Speed Over Ground (sea bottom) or geographical travelled way.
The travelled way from point to point can be much lesser as for STW.
STW:
Speed Through Water means the effectively travelled way including current,
beat, leeway etc. (in a specified/known time).
The travelled way by speed through water can be much longer as for SOG.
NMEA:
National Marine Electronics Association 0183 – Standard for interfacing
marine electronic navigational devices
IMO:
International Maritime Organization
SOLAS:
Safety Of Life At Sea
MSC:
Maritime Safety Committee
P/N:
Part Number
kn:
Knots
CDU:
Control and Display Unit