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Transcription
Preliminary Report
Eastern Area Cruise No. 38
Itinerary: 22 March 2030 Depart San Diego
24 March 0835 Arrive Pt. Ash
28 March 1030 Depart Grid between Points
Hemlock & Juniper
29 March 1100 Arrive San Diego
Personnel: Robert L. DeLong (Biologist in Charge)
Robert L. Brownell
Vernon M. Kleen
Survey Vessel: M.V. Sioux City
Methods
Diurnal observations were conducted from the open flying bridge.
Excellent observations can be made from here and it is quite comfortable
for the observers. Since the ship is also piloted from this bridge, the
true and magnetic course as well as the ship's speed are available and
can be used to determine flight direction of the birds and movements of
the mammals. Nocturnal watches were not made. Weather conditions did
not allow use of the Boston Whaler. No bird specimens were taken; how-
ever, one small cetacean was harpooned from the bow and collected.
Cruise Track
The Grid was followed reasonably well the first three days, but
trouble with the ship and rough seas caused us to alter the course about
midway between Points Elm and Fir. Due to continued problems the ship
returned to San Diego. After variable changes of course (see Figure 1)
we departed the Grid at 1030 hours on 28 March between Points Hemlock
and Juniper.
Conditions
Weather was unfavorable during the first four days in the Grid with
heavy northwest winds, rough seas and swells ranging to 15 feet. The
skies were overcast with rain squalls in the distance. The ship averaged
only 7-1/2 knots into the wind and up to 10 knots when moving with it.
The sun appeared through the partially cloudy skies on the 28th and winds
subsided. Fog set in during the night of the 28th and finally disap-
peared just before the ship arrived in San Diego.
Highlights
Near complete disappearance of Fulmars, Black-legged Kittiwakes,
and Glaucous-winged Gulls.