R. L. Plaisted Expedition to the North Pole, 1968

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FIELD WORK
339
1967, activities were concentrated on the west-east axis between Disko Bugt and
Cecilia Nunatak; in 1968 the emphasis will be on that between "Point Nord " and " Point
Sud".
Two stations were occupied: one for studies of cosmic rays and meteorology at
"Carrefour", and one for meteorology only at "Station Jarl-Joset", though work was
interrupted at the latter due to electrical failures.
Geodesy. Two field parties covered the length of the axis between Cecilia Nunatak
and Camp VI, travelling in opposite directions and thus each checking the others'
measurements.
Geophysics. A field party operated between "Camp VI" and "Depot 420" carrying
out a programme of seismology, gravimetry, magnetism, barometric and temperature
measurements. An under-ice profile was run between "Milcent" and "Camp VI"
by radar.
Glaciology. Specimens of ice for 14C-dating were collected, and ablation measurements made, on the west coast and at "Camp VI".
Scientific personel, EGIG, 1967
P.-E. Victor, leader of expedition
R. Guillard, chief of operations
Geodesy, Group A
K. Nottarp, leader
F. J. Heimes
One radio operator and one mechanic
Geodesy, Group B
L. Faivre, leader
P. Frenay
B. Gibon
Geophysics
C. Marinier, leader
H. Allnoch
H. Kohnen
A. Karsten
H. Wagner
J. C. Pignac
J. Vidal
One radio operator
F. Thyssen
H. Wilcke
One electrician
Glaciology
H. Oeschger
B. StaufTer
H. Clausen
One mechanic
Meteorology
O. Reinwarth
J. P. Renard
One mechanic
Cosmic rays
W. Ambach
G. Marckl
One mechanic
Two. transport groups, led by R. Guillard and J. Volot; one helicopter group under
Lieutenant J. C. Marescot, l'Armee de l'Air Franchise; and a group of four Nord 2501 aircraft
from Armee de l'Air Franchise.
R. L. PLAISTED EXPEDITION TO THE NORTH
POLE, 1968
[Summarized from information supplied by the Selz Organization, Incorporated. A
note on the unsuccessful effort of the party to reach this goal in 1967 appeared in the
Polar Record, Vol 14, No 88, 1968, p 47.]
R. L. Plaisted led a successful expedition from a base on Ward Hunt Island to the
North Pole in March-April 1968, the journey beginning on 7 March and ending
forty-three days later, on 19 April.
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340
FIELD WORK
The party, with four twin-ski, 16 hp, Ski-Doo Snowmobiles, travelled 1320 km to
cover the crow-flight distance of about 760 km owing to a variety of hazards.
Ice conditions were difficult with, in the early stages of the journey, pressure ridges
of up to 15 m to get past and, in the later stages, numerous open leads appearing and
causing delay in the march. The day after the party reached the North Pole their
position was confirmed by a United States Air Force weather reconnaissance aircraft.
The expedition's Otter support aircraft evacuated the party to Ward Hunt Island.
The full complement of the expedition was: R. S. Plaisted, leader; D. E. Powellek,
deputy leader, radio-electronics, A. C. Aufderheide, medical officer, photography;
J. L. Bombadier and W. H. Pederson, mechanics; and G. R. Pitzi, navigation. At the
time when the party reached the North Pole, Aufderheide and Powellek were back at
base, having returned by support aircraft to "work on photographic and electronic
problems".
ARGENTINE ACTIVITIES IN THE ANTARCTIC, 1966-67
[Summarized from information provided by the Argentine Government under the
terms of the Antarctic Treaty, and by the Instituto Antdrtico Argentine Accounts of
previous activities appeared in the Polar Record, Vol 13, No 86, 1967, p. 611-14.]
Relief and re-supply operations were carried out by the icebreaker General San
Martin and the transport Bahia Aguirre of the Grupo Naval Antartico.
Aircraft used included four Albatross, three C-47, one Neptune, one DC-4, four
Beaver and two H-19 helicopters.
Stations. The following were occupied throughout the year: "Orcadas" (Naval)
Laurie Island, South Orkney Islands; "Decepcion" (Naval), Deception Island; "Almirante Brown" (Instituto Antartico Argentino), Coughtrey Peninsula, Danco Coast;
"Esperanza" (Army), Hope Bay; "General Belgrano" (Army), Filchner Ice Shelf;
"Teniente Matienzo" (Air Force), Larsen Nunatak, Seal Nunataks; "Alfarez de
Navio Sobral" (Army) Filchner Ice Shelf.
A new station, "Petrel" (Air Force and Naval), was opened on 22 February 1967 in
lat 63° 28' S, long 56° 17' W, on Dundee Island. The object of this installation appears
to be to support an investigation into the possibility of constructing a solid earth runway on the island.
Reconstruction work, and the installation of new facilities, continued at " Almirante
Brown" and "General Belgrano" stations.
Field work
Biology. Ornithological observations were made at "Almirante Brown", "Decepci6n" and "Orcadas", as well as during re-supply voyages. Marine biological specimens were collected from the Hope Bay area. Some work on human physiology was
done at "Almirante Brown", "Esperanza" and "Teniente Matienzo".
Meteorology. Surface observations continued from all stations except "Petrel", and
from re-supply ships.
Glaciology. Routine ice and snow studies continued at all stations, particularly at
"Petrel" in connexion with the suggested runway.
Upper air physics. Auroral observations continued at "Orcadas", "Decepcion",
"Almirante Brown", "General Belgrano", and "Sobral"; ionospherics at "Decepcion" and "General Belgrano"; radio-activity at "Decepcion" and "Almirante
Brown".
Air photography. Air photographs were taken of the Larsen Ice Shelf for the Instituto
Geografico Militar and for use in Derrotero Aerondutico Antartico.
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