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Re: Silicon Sea II: Leg 46, CORRECTION
From: Mike Wescott
Date: 1999 Feb 07, 18:49 EST
From: Mike Wescott
Date: 1999 Feb 07, 18:49 EST
> 1) Using our waypoints, what is the TOTAL rumbline distance we will > travel to Boston? > -- ----------------------------------------------------------------- 14112.8 nmi. Using WGS 84 for calc of meridional parts: Merid Delta Delta Delta RL Latitude Longitude Parts MPs Long Lat Dist Course --------- ---------- --------- --------- ------- ------- ------- ----- 33 50.8S 151 18.0 E -2147.567 34 00.0S 151 40.0 E -2158.603 -11.036 22.0 -9.2 20.5 116.6 38 40.0S 166 45.0 E -2504.864 -346.261 905.0 -280.0 783.6 110.9 40 50.0S 174 00.0 E -2673.302 -168.439 435.0 -130.0 360.0 111.2 41 30.0S 175 20.0 E -2726.236 -52.934 80.0 -40.0 72.5 123.5 56 04.0S 67 15.0 W -4061.940 -1335.704 7045.0 -874.0 4691.9 100.7 51 40.0S 57 40.0 W -3614.752 447.188 575.0 264.0 430.0 52.1 00 00.0N 23 00.0 W -0.000 3614.752 2080.0 3100.0 3576.6 29.9 13 10.0N 59 20.0 W 791.804 791.804 -2180.0 790.0 2314.1 290.0 42 10.0N 70 00.0 W 2779.722 1987.918 -640.0 1740.0 1828.0 342.2 42 20.0N 70 46.0 W 2793.182 13.460 -46.0 10.0 35.6 286.3 ------- 14112.8 > 2) At an estimated speed of 8.4 Knots, how many days is the total > trip? > -- -------------------------------------------------------------- 70.0 days 14112.8/8.4 = 1680.1 hrs 1680.1/24 = 70.00 days > We will have a total of 8 crew when we depart Wellington. We estimate > water consumption at 2 gal/day per man (person). Food required is > estimated at 1 3/4 lbs/day per man. Plus 50% in case of a slow > passage. And 10 days emergency rations at 3/4 lb per day. Using these > figures for the trip. > 3) What is the total weight of food provisions for the trip? > -- --------------------------------------------------------- Assumption: "trip" means Wellington to Boston Assumption: emergency rations are 3/4 lb per day (as stated) and not 3/4 lb per day per person for 10 days 1351.5 lbs Wellington to Boston: 12876.2 nmi (Rhumb Lines) 12876.2/8.4 = 1532.9 hrs 1532.9/24 = 63.9 days (use 64). 1.50 * (8 * 64 * 1.75) + 10 * .75 = 1351.5 4) How long will the water tanks supply (See NOTE below) last? -- ----------------------------------------------------------- 13.75 days 220 / (2 * 8) = 13.75 > We can store an additional supply on deck in containers. We add 110 > gals of water. > Our stop is at Wellington, New Zealand. The arrival waypoint is (40d > 50.0'S 174d 00.0'E), just north of Stephens Island. > 5) What is the TC and Dist from our departure point(33d 50.8'S > 151d 18.0'E)? > -- ------------------------------------------------------------ TC 111.1 Dist 1164.1 (Mercator Sailing) Lat Long MP dLat dLon dMP Dist Course -------- --------- --------- ------ ------ ------- ------ ------ 33 50.8S 151 18.0E -2147.567 40 50.0S 174 00.0E -2673.302 -419.2 1362.0 -525.74 1164.1 111.1 > 6) What is the Great Circle route and initial course? > -- -------------------------------------------------- TC 117.9 Dist 1157 using law of cosines formulae > Our anticipated departure date is February 17, 1999. > 7) What is the Zone Time(ZT) of sunrise at Sydney, Australia > (33d 50.0'S 151d 20.0'E)? > -- ---------------------------------------------------------- 0531 >From Almanac 2/17/99 Sunrise: 30S 0541 Interpolation (from table): -5 1d 18.0' (More East = Earlier): -5 ---- 0531 <PRE> -- -Mike Wescott mike.wescott@XXX.XXX =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=--=-= =-= TO UNSUBSCRIBE, send this message to majordomo@XXX.XXX: =-= =-= navigation =-= =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=--=-= </PRE>