NavList:
A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Confused about Silicon Sea: Leg 89 ver. 1.2 part 3
From: Renee Mattie
Date: 2004 Mar 15, 22:10 -0500
From: Renee Mattie
Date: 2004 Mar 15, 22:10 -0500
I am confused by part 3 of this leg. Has anyone worked it? The problem states[W]e are unable to get a Fix for 3 days until .. Log ... 724.4 nmi since .. RFIX on 11/09/2002 at 05:10:21 UT [until 15/09/2002 at 03:30:31 UT] ... Speed 10.3 ktsBy my calculation, this is an elapsed time of ~4 days (3 days 22:20:10) or 94.336 hr. At 10.3 kts, this would give a distance travelled of 971.7 nmi, not 724.4 nmi. The 724.4 nmi is consistant with a travel time of 2days 22:20:10, which would put us on the 14th (The solution gives a date of 14/09/2002) 2002y 09m 15day 03:30:31 = 2002/09/14 27:30:31 2002y 09m 14day 27:30:31 2002y 09m 11day 05:10:21 ------------------------ 0000y 00m 03day 22:20:10 The Almanac data given with the problem seems to be more or less in Agreement with that given by the USNO data online page for the 15th, not the 14th. (http://aa.usno.navy.mil/data/docs/celnavtable.html)
