# NavList:

## A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding

**Re: Silicon Sea II: Leg 46, CORRECTION**

**From:**Dan Hogan

**Date:**1999 Feb 08, 08:07 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 Well by TOTAL I meant from Sydney, but I should have specified the route properly. The rest of your calculations are OK. I throw in Great Circle because people ask for it but I never found any use for GC in a small sailboat. On board I use a calculator with Mercator Sailing. Dan Hogan WA6PBY dhhogan{at}XXX.XXX Catalina 27 "GACHA" =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=--=-= =-= TO UNSUBSCRIBE, send this message to majordomo{at}XXX.XXX: =-= =-= unsubscribe navigation =-= =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=--=-=