How to guess speed of a ship?

[Pisces]

Originally Posted by GertFroebe_neu

Also very interesting! I guess it does this only applies when the ship ist moving exactly in front of my periscope, passing by. So I got to get ahead of the ship again to attack it, right?

cheers
Marc

PS.: The AOBF can not be moved. Same Problem with the Attack disc!

I just responded about this to Trevaly in his RAOBF thread.

http://www.subsim.com/radioroom/show...&postcount=189

The ship needs to be in your periscope view obviously just before it passes the line. But any AOB between 15 and 165 degrees should present a nice view. Near 0 or 180 is difficult as the ends might be obscured by large structures on deck. Any AOB would take the same time. If you do not have the periscope aimed at 0 or 180 degrees your (even slight) speed affects the results. The solution is to turn to make that happen.

[Trevally.]

Originally Posted by Pisces

If you do not have the periscope aimed at 0 or 180 degrees your (even slight) speed affects the results. The solution is to turn to make that happen.

Good tip, thank Pisces

[Matador.es]

simple, get the ships lengt, measure the seconds it takes to move from the front to back over the vertical line of your scope. Divide meter by seconds, multiply by, 1.856 and you have speed in knots.

[Pisces]

Originally Posted by Matador.es

simple, get the ships lengt, measure the seconds it takes to move from the front to back over the vertical line of your scope. Divide meter by seconds, multiply by, 1.856 and you have speed in knots.

Not quite, 3600/1852= 1.944 (you also have to deal with seconds-to-hours)

But 2 would be easy and good enough for short range shots.