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Subject: Re: Silicon Sea: Leg 83 answers
From: Paul Hirose (paulhirose@XXX.XXX)
Date: Thu Sep 19 2002 - 19:26:27 EDT
1. The navigator should see the peak of Mauna Loa about 135 miles out.
2. TC = 286. Subtract 1 degree for current. Subtract 11 degrees for
compass error. CC = 274 to Mauna Loa.
3. Nearest multiple of 15 deg longitude is 150W, so we are 10 hours
behind UT.
4. DR at 140 mile point is 19 24 N 154 32 W.
5. TC = 305. Add 1 degree for current. Subtract 11 degrees for compass
error. CC = 295 to pass Cape Kumukahi.
6. Distance from passing Cape Kumukahi to Hilo entry point is 26
miles.
7. Total DR distance from the running fix to Hilo entry point is 177
miles. At 10 knots we should arrive there July 17 about 0100Z, or July
16 1500 ZT. That ignores any current.
I used a piece of typing paper to make a plotting sheet. The horizon
distance and heading computations were done on an E-6B aeronautical
slide rule. The wind side works perfectly well for current; you just
mentally divide the speed markings by 10 or 20.
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