question about torpedo depth & under the keel shots.

gutted · 09-21-09, 11:26 AM

just did some extensive testing (note: im using TMO). Loaded up the nav training mission with manual targetting off (for speed). turned the ship to point at the T3 tanker and saved. Also note, i use metric.. so you imperial skippers will have to convert it. (3m = around 10 feet).

For each test i fired 4 fish set for contact/mag, and in each test 1 of them blew before ever reaching the tanker (again.. im using TMO mod).

T3 = 10.7m draft.

1st test:
10.7m depth = All fish sailed underneath harmlessly

2nd test:
9.7m depth = 1 mag detonated, rest pased by harmlessly.

3rd test:
8.7m depth = 1 mag detonated, 2 impacted.

4th test:
7.7m depth = 3 impacts

5th test:
9m depth = 3 mag detonations underneath, ship cracked in half.

6th test:
8.7m depth = 3 impacts

7th test:
9.5m depth = 1 mag detonation, 2 sailed by

8th test:
9m depth = 1 impact, 2 mags underneath... ship cracked in half

9th test:
9m depth = 3 mags, ship cracked in half

so my findings are....

just shy of 2m less than then the listed draft.

in this case 10.7m draft, just less than 2m would be ~9m depth.

in perfectly calm seas probably exactly 2m less than listed is ideal. heavier seas, you'd probably set it 3m less than listed im guessing.

one thing of note.. there's a huge difference in torpedo's striking near keel, and blowing up just underneath it. the ones that impacted near the keel didn't blow nearly the size of the hole as the ones that blew up just underneath it (as seen from the Free Camera). lastly, the distance from the bottom of the ship you need to be and still get a mag det. is MUCH less than in SH3. you need it to pass right underneath the ship really close. in SH3 you could be up to 2m below the ship and still have it go off... not here.

so to wrap it up:

From now on, if i have really calm seas i'll go for a mag det with 2m less than listed draft. Anything more than really calm seas, and you can expect at minimum 1 in 4 torpedos to blow prematurely when set for magnetic in TMO (even more in rougher weather).

09-21-09, 11:26 AM	#2
gutted The Old Man Join Date: Apr 2005 Location: New Orleans, LA. Posts: 1,379 Downloads: 487 Uploads: 11	just did some extensive testing (note: im using TMO). Loaded up the nav training mission with manual targetting off (for speed). turned the ship to point at the T3 tanker and saved. Also note, i use metric.. so you imperial skippers will have to convert it. (3m = around 10 feet). For each test i fired 4 fish set for contact/mag, and in each test 1 of them blew before ever reaching the tanker (again.. im using TMO mod). T3 = 10.7m draft. 1st test: 10.7m depth = All fish sailed underneath harmlessly 2nd test: 9.7m depth = 1 mag detonated, rest pased by harmlessly. 3rd test: 8.7m depth = 1 mag detonated, 2 impacted. 4th test: 7.7m depth = 3 impacts 5th test: 9m depth = 3 mag detonations underneath, ship cracked in half. 6th test: 8.7m depth = 3 impacts 7th test: 9.5m depth = 1 mag detonation, 2 sailed by 8th test: 9m depth = 1 impact, 2 mags underneath... ship cracked in half 9th test: 9m depth = 3 mags, ship cracked in half so my findings are.... just shy of 2m less than then the listed draft. in this case 10.7m draft, just less than 2m would be ~9m depth. in perfectly calm seas probably exactly 2m less than listed is ideal. heavier seas, you'd probably set it 3m less than listed im guessing. one thing of note.. there's a huge difference in torpedo's striking near keel, and blowing up just underneath it. the ones that impacted near the keel didn't blow nearly the size of the hole as the ones that blew up just underneath it (as seen from the Free Camera). lastly, the distance from the bottom of the ship you need to be and still get a mag det. is MUCH less than in SH3. you need it to pass right underneath the ship really close. in SH3 you could be up to 2m below the ship and still have it go off... not here. so to wrap it up: From now on, if i have really calm seas i'll go for a mag det with 2m less than listed draft. Anything more than really calm seas, and you can expect at minimum 1 in 4 torpedos to blow prematurely when set for magnetic in TMO (even more in rougher weather).