NavList:
A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Re: awareness
From: Jared Sherman
Date: 2003 Apr 23, 14:52 -0400
From: Jared Sherman
Date: 2003 Apr 23, 14:52 -0400
Doug- <"If the pitch of the prop is 26.3 ft. and the revolutions of the shaft is 87,421 revs. in a 24 hr. period,calculate the days advance allowing for a negative 7 % prop slip."> Does that resolve to 26.3 ft. x 87,421 revs.= 2,299,172.3 feet per day less 7% slip= 2,138,230.2 feet per day advance? And does anyone actually count shaft rotations as a means of dead reckoning? And, how are you supplied with slip for a particular prop and hull? Or is that something you have to measure and calculate while under way?I fully agree with you! If you told the average boater that you had heard explosions on his boat, he'd be upset. But, without the explosions, the engine isn't working. Absent the knowledge of the explosions, the boater can still be quite merrily on his way. Certainly not I!
