NavList:
A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Silicon Sea: Leg 32
From: Dan Hogan
Date: 1997 Jul 30, 1:33 PM
From: Dan Hogan
Date: 1997 Jul 30, 1:33 PM
Sight Reduction and Dead-Reckoning problem Leg 32 073097 Test your knowledge! ---------------------- ------ ------ -------------------- At 24:00:00ZT on 28/06/1996 our EP was (12d 37.9'N 60d 31.0'E). Our plotted TC is 123.2d Speed 8Kts, Current Drift 9 Kts @ Set 86d. Var0dw Dev2dW. 1) What is the Speed Made Good(SMG)? What is the Compass Course Made Good(CCMdGd)? -- --------------------------------------------- Using the SMG and our TC. 2) What is our Estimated Position(EP) at 0800ZT on 28/06/1996? -- ----------------------------------------------------------- 3) From this DR what is the TC and Dist to the Mali' Waypoint (04d 10.0'N 73d 30.0'E? -- ---------------------------------------------------------- At Noon We get a break in the clouds and get a LAN sight of the Sun. Use the DR for 12:00:00ZT this date. 4) What is the Zone Time(ZT) of Meridian Passage of the Sun? -- --------------------------------------------------------- 5) What is the Zone Description? -- ----------------------------- 6) What is the Noon LAT if the Sun's Hs was 74d 08.3'? -- --------------------------------------------------- 7) What is the differance in Lat? Is the LAN N or S of our DR? -- ------------------------------ 8) What is the DR at 19:00:00ZT, using the Q3 TC and SMG? -- ----------------------------------------------------- Note: Lat & Lo = XXd XX.X', Date=DD/MM/YY, HE 8 Feet, Index correction -.2', Time hh:mm:ss in UTC/GMT. Silicon Sea is a medium displacement sailing vessel, 40 Feet LOA. 38 Feet LWL; Cutter rigged. Looks a lot like a Mason. Can tack to 45d. Dist to Horizon: Nmi = SQRT HE@mtrs x 2.07; Nmi = SQRT HE@ft x 1.17. Water Tank = 60 gal(Imp.). Fuel Tanks = 90 gal (Imp.). Fuel consumption .450 gal/Hr at 8.3 Kts. PLEASE respond with your results and thinking on these exercises to the NAVIGATION list at large. If you have questions or problems, A lot of folks on the list are knowledgeable and willing to help. Any questions or doubtful areas will be responded to promptly. Let us hear from you soon! Good Navigating! -=The Navigation List Working Group=- Peter Smith - psmith@wellspring.us.dg.com Ron Legere - ronald.legere@yale.edu Tony Severdia- anthonys@ix.netcom.com Wes Muffin - wmurfin@onslowonline.net (Cartographer) John Simmonds- mobi@netconnect.com.au Dan Hogan - dhhogan@lightside.com Dan Hogan WA6PBY Yacht GACHA West Covina, CA Catalina 27 dhhogan@lightside.com San Pedro, CA =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=--=-= =-= TO UNSUBSCRIBE, send this message to majordomo@ronin.com: =-= =-= navigation =-= =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=--=-=