NOTES MADE TO ASSIST COMPLETION OF BUOYANCY DECLARATION (FORM)
1. Particulars of Vessel
Based on same formula in Plastic bottles or foam
Volume = length x width x height = cubic metres
1 cubic metre = 1000ℓ flotation which is the same as 1000kg weight yet only 60% required, or lℓ
(bottle or foam) = 1kg weight.
Measure the vessel in sections trying to get as close to a rectangle as possible. Obviously
allowances must be made for curvature.
In the same way measure the hatch space.
Then take the total volume and subtract the hatches giving you the net cubic metreage.
32kgs Polyurethane closed cell foam equal to 1 cubic metre to fill a16-foot boat approximate
75kgs foam giving you +-2500kg buoyancy. Where 708kgs is required.
NOTES MADE TO ASSIST COMPLETION OF BUOYANCY DECLARATION (BOTTLES)
Particulars of Vessel
1) Vessels Weight:- The weight of this hull can normally be obtained from a ski-boat
manufacturer. For example a 16’00” vessel +- 480kg
2 x 75hp Motors @ 100kg
=
200kg
Accessories, equipment fuel =
200kg
880kgs
4 Crew @ 75kgs
300kgs
1180kgs
2) Part of Buoyancy Type
a) 1ℓ approved type plastic both with screw locking type cap filled with polystyrene
beads. 1ℓ bottle = kg + Buoyancy.
b) The Boat has 820 1ℓ bottles 820kgs flotation – only 708kgs flotation is required.
Where the hull has cavities these must be identified.
SIDE VIEW
TOP VIEW AS IN
A MULTI-HULL
If no cavities this must also be shown.
SIDE VIEW
TOP VIEW
AS IN A MONO-HULL
MANUFACTURER’S CERTIFICATE
BUOYANCY DECLARATION
This declaration may be used where existing (older) vessels are surveyed by a SADSAA surveyor and
where a statement from the manufacturer is unobtainable.
I (name of owner) ……………………………………………, hereby declare under oath that the information stated
below is correct.
Name of Boat: ___________________________
Length of Boat: _________
Type of Boat: _________________________
Approved Number: ______________________
Particulars of Vessel
1.
2.
3.
Vessel’s weight
Weight of crew
Total weight
………..
………..
………..
kg (complete boat with engines and fittings)
kg (calculated at 75kg per person)
kg (sum of 1 and 2)
Particulars of Buoyancy
1.
Type of buoyancy fitted
(Full description of foam or bottle type)
……………………………………………………………………………………………………………
……………………………………………………………………………………………………………
2.
Amount of buoyancy (number of bottles, or in the case of foam, a brief explanation of the calculation –
expressed in litres or dm³
……………………………………………………………………………………………………………
……………………………………………………………………………………………………………
……………………………………………………………………………………………………………
……………………………………………………………………………………………………………
3.
Simple drawing of boat showing the position and distribution of buoyancy:
4.
Note: The amount of buoyancy required is 60% of the total weight of the crew and boat combined.
Should you not be able to make an honest and/or complete declaration as to the buoyancy provided in
your vessel and you are confident that it complies, an alternative practical flotation test may be carried
out and witnessed by a SADSAA Surveyor.
Vessel ability to Survive Flooding (Regulation 6)
A flooding test was conducted by opening the aft drains with the vessel fully loaded. With the vessel
so flooded, the vessel remained afloat with positive transverse stability, i.e. it did not capsize.
-------------------------------------------------------------Surveyor Signature
----------------------------------------------Date
Vessel Ability to Survive Swamping (Regulation 6)
A swamp test was conducted by sealing all scuppers and filling the vessel with water to the top of the
gunwale with the vessel in a fully loaded condition. With the vessel so flooded, the vessel remained
afloat with positive transverse stability, i.e. it did not capsize.
-------------------------------------------------------------Surveyor Signature
----------------------------------------------Date
Approval and Operation
This vessel is approved for operations at sea from a designated safe launching site and limited to a
maximum of 15 miles offshore (Category C) provided that 2 outboard engines are fitted. The vessel is
not approved for surf launching due to the lack of deck drainage.
This test involves flooding a loaded vessel’s hull (by whatever means) and demonstrating that the
vessel remains buoyant throughout. It is recommended that all weights such as engines equipment
and persons are simulated by sand bags of equivalent weight to prevent injury or damage should the
boat fail the test. The cost of witnessing the test will be charged at SAMSA’s normal hourly rate.
Owner’s signature (In the presence of a Commissioner of Oaths) …………………………...
A1.
I certify that before administering the oath/affirmation I asked the deponent the following
question and wrote down his/her answers in his/her presence.
1.
Do you know and understand the contents of this declaration?
Answer:
2.
Do you have any objection to taking the necessary oath?
Answer:
3.
…………………………………………
Do you consider the prescribed oath binding on your conscience?
Answer:
A2
…………………………………………
…………………………………………
I certify that the deponent has acknowledge that he/she knows and understands the contents
of this declaration which was sworn to/affirmed before me and the deponent’s signature was
placed thereon in my presence.
………………………………………………..
Commissioner of Oaths
Designation (Rank) ……………………………
Date: ……………………………………………
Place: ……………………………………….
SURVEYOR’S STATEMENT
I have applied my mind to the details provided by the owner and inspected the vessel concerned and
find no inconsistencies which would cause me to question that the vessel has not been fitted as
declared. The declared buoyancy can reasonably be expected to comply with the regulations.
Any other comment ………………………………………………………………………………..
………………………………………………………………………………………………………..
Certificate is valid until……………………………………………………………………………..
Surveyor Signature
Surveyor Stamp