Accurate Lengths Of IJN ships ?

[LCQ_SH]

Originally Posted by Rockin Robbins

Germans used what Americans call constant bearing techniques, aiming at a point that the enemy must pass with targeting methods where range, and thus target identification, cancels out of the equation. You COULD ID the target if you wished. It didn't matter. You still hit the target.

Go to the SH3 forum and search for "Fast 90." You can also read "Clear the Bridge" by Dick O'Kane, where he describes the technique. I don't think he explains that the technique came from the U-Boats, but Eugene Fluckey in "Thunder Below" wasn't bashful about saying it at all. American skippers studied the accomplishments of U-boat skippers to learn anything they could, in order to do better.

I guess these techniques refer or should be related to 0° gyro angle attacks and the "four bearing" methods, right? I mean, for a u-boat that is easy to do without a radar as their hydrophone had a range for convoys around 30-50 NM which gives you enough time to determine course and speed.

Is that true that American hydrophone was so much less capable than German's by only being capable to pick up ships at 10K yards? the four bearing method and 0° gyro attacks by hydrophone listening are possible for a very slow moving ship. Late in the war subs had radar, but before radar, how was that possible?