How long would you wait?
 

For a Ise BB to sink? She took 4 torps in the starboard side, and is stationary. The deck on the torpedoed side is almost level with the water, I have been submerged for almost 12 hours and no change in list. Oh, BTW I have no torps left :(

Probably ain't gonna happen. You could always use your deck gun. :ping:

Tried that, its amazing what amount of damage they can do with those pesky 13" guns!

How bad do you want the tonnage? That is the real question. You could wait for another 10-12 hours and wait for her to go under or you could wait that long and have her just sit there and not move another inch. It all depends on your patience level.

On the weekend, I put three evenly spaced torpedoes into a modern European composite freighter - fish were spaced bow, under the foremast, and under the mid superstructure. She settled to the point the bow was completely submerged - water literally lapping at upper superstructure deck.

She then eventually steamed off at 7 knots, and never sank. I was out of everything but 20mm, and there were two Akizuki's watching over her.

Only 4 fish into a BB? I'd expect by now, she's just not going to go down.

Sometimes (using NSM classic 3.3), it just frustrates the bejeezus outa' me that some ships just will not sink, even when half submerged from flooding! Another modern European composite I'd hit earlier, with only one fish under the foremast, sank in about 15-20 minutes, no problem.

The vagaries of war :cry:

I shot 6 at her, 2 of them missed.

Well, I waited another 12 hours with no change in position, so I checked out. Didn't get credit for that kill, but they sure were happy about that Yamato and Maya that I sank. Poor Maya took the salvo that was meant for Yamato 2 in the task force. Blew it apart with quickness!

Yeah, NSM makes things interesting, but the randomness frustrates me as well. Once I put a couple of torps into a medium composite, surfaced and blew its rudder away, then shot its waterline all to hell, and it was STILL steaming along at 5 knots with a slight list. I eventually had to put another torpedo into her before she started to seriously list and the crew finally bailed.

Another time I plugged a Hiryu sitting in port with 10 torpedoes all across its starboard hull, it took something like 15 minutes to settle on the bottom...

Is she listing?
 

If she is listing enough you could go around to the other of the ship and open up with your deck guns. She should not be able to lower her guns enough to reach you. (just remember that if you hole her below the water line on both sides she will level up and then you will become targetable....)