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This is the place to discuss general issues related to the U-boat war or the war at sea in WWII. 
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Re: Navigation
Posted by: Parade ()
Date: November 14, 2001 09:24PM

<HTML>Hi Bill,
Submarines used knot-meters, like pitot tubes, as surface ships. But the difficulties are the estimate currents. (force and direction) So, every time she surfaced, the navigator observed with astronomic instruments and calculated the new nautical position. Sometimes, the different was important (about 10 to 15 nautical miles after 24 hours submerged).
Now, there are a lot of knot-meters, inertial systems which are a very good accuracy. Less than 1 nm per week.
Regards</HTML>

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Subject Written By Posted
Navigation Bill Watt 11/14/2001 04:13PM
Re: Navigation Bram 11/14/2001 05:01PM
Re: Navigation Antonio Veiga 11/14/2001 08:59PM
Re: Navigation Parade 11/14/2001 09:24PM
Re: Navigation Theo Horsten 11/17/2001 12:47PM
Re: Navigation Theo Horsten 11/17/2001 01:13PM
Re: Navigation jim king 11/17/2001 10:39PM


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