is it ok to compute a solution at long range then close in?

joegrundman · 07-02-09, 06:47 AM

no it doesn't do anything like that.

Range affects the computed gyro angle in cases where the gyro is not 000. This is because the line of sight from the periscope and the torpedo track are not the same thing with non 000 gyros. in practice however the difference is small enough to be ignored with gyros of +/- 15 degrees at reasonably short ranges.

And this is because the periscope is in the center of the boat, whereas torpedoes are launched from the front, go ahead for a whlie then begin a turn with a turn radius before following the computed path.

But with larger gyros, accurate range readings become necessary

07-02-09, 06:47 AM	#8
joegrundman Ocean Warrior Join Date: May 2007 Posts: 2,689 Downloads: 34 Uploads: 0	no it doesn't do anything like that. Range affects the computed gyro angle in cases where the gyro is not 000. This is because the line of sight from the periscope and the torpedo track are not the same thing with non 000 gyros. in practice however the difference is small enough to be ignored with gyros of +/- 15 degrees at reasonably short ranges. And this is because the periscope is in the center of the boat, whereas torpedoes are launched from the front, go ahead for a whlie then begin a turn with a turn radius before following the computed path. But with larger gyros, accurate range readings become necessary __________________ "Enemy submarines are to be called U-Boats. The term submarine is to be reserved for Allied under water vessels. U-Boats are those dastardly villains who sink our ships, while submarines are those gallant and noble craft which sink theirs." Winston Churchill