[REL] Depth charge water disturbances

Stiebler · 03-20-11, 05:10 AM

Times for asdic disturbance:

When escorts dropped depthcharges, they sank slowly, and exploded at different depths (e.g. some at 100m, some at 150m, for a 'bracket' of the U-boat.)

Thus the total time of disturbance was likely to be of the order of minutes, not seconds. I think Rubini's suggestion of 10 minutes was pretty good.

[To give a concrete example, when two *expert* sloops attacked U-504 almost simultaneously, at great depth, in two attacks separated by just six minutes, it required almost an hour to re-establish contact. This was in June 1943, when asdic equipment was efficient.]

Also, the whole point of the Hedgehog-discharged bombs (not depthcharges) was that they exploded only on contact with a U-boat (this is wrongly modelled in SH3), so there was never *any* disturbance in the water if they missed their target. That was why the hedgehog attack was so popular - no loss of asdic contact during the approach to the target, no loss of contact by neighbouring escorts if the bombs missed.

This is another great mod, TDW, indeed another essential mod. But times of disturbance have to be changed, and I regret to say that it is desirable to remove the addition for the hedgehogs.

Stiebler.

03-20-11, 05:10 AM	#11
Stiebler Fuel Supplier Join Date: Oct 2005 Location: London, UK Posts: 1,237 Downloads: 29 Uploads: 4	Times for asdic disturbance: When escorts dropped depthcharges, they sank slowly, and exploded at different depths (e.g. some at 100m, some at 150m, for a 'bracket' of the U-boat.) Thus the total time of disturbance was likely to be of the order of minutes, not seconds. I think Rubini's suggestion of 10 minutes was pretty good. [To give a concrete example, when two expert sloops attacked U-504 almost simultaneously, at great depth, in two attacks separated by just six minutes, it required almost an hour to re-establish contact. This was in June 1943, when asdic equipment was efficient.] Also, the whole point of the Hedgehog-discharged bombs (not depthcharges) was that they exploded only on contact with a U-boat (this is wrongly modelled in SH3), so there was never any disturbance in the water if they missed their target. That was why the hedgehog attack was so popular - no loss of asdic contact during the approach to the target, no loss of contact by neighbouring escorts if the bombs missed. This is another great mod, TDW, indeed another essential mod. But times of disturbance have to be changed, and I regret to say that it is desirable to remove the addition for the hedgehogs. Stiebler. __________________ NYGM Tonnage War Mod - More than a mod: it's an experience!