My Problem with NYGM

[Herr Minger]

I was patroling off the east coast of England early in 1940 and managed to sink a lone merchant close to shore( around 35 miles). I had already taken a bit of hull damage ( hull integrity 85%). Soon after this a detroyer appeared and I dived. Now the problem started because I was unable to maintain depth without going to full ahead and this left me with 4 options.

Rest on the bottom (76 meters) this didn't work as I kept getting detected by asdic

Emergency blow and then a burst of speed from resting on the bottom to avoid a depth charge run. Clearly you can only do this so many times

Constantly evade depth charges by changing depth and speed. this doesn't work because you can always be detected and can't maintain depth at slow speed.

rise to periscope depth and take on the destroyer after he has made a run. I tried this but missed.

Needless to say I died.

Why can't NYGM keep a depth at slow ahead but GWX can. If I could have used silent mode I would have shaken the destroyer off.

[Sailor Steve]

That's there intentionally. It's called the 'Anti-Hummingbird Mod' and it is historically accurate. At very slow speeds they had trouble maintaining depth and had to speed up or run the pumps, both of which made noise.

GWX used to have a bit where the boat would rise some, for the same reason. The decided to dump it for reasons I don't know for sure.

There used to be a stand-alone version of 'Anti-Hummingbird'. I wish I still had my copy because I would love to use it again, liking realism the way I do.

[Herr Minger]

I can see your point and it may be more accurate but it doesn't seem to happen if you have not taken any damage. I was shot up a bit by a hurricane and that was enogh to trigger this Anti-Humming bird mod effect.

Not being able to maintain depth at silent speeds means I will definately do my best not to tangle with any escorts

[Stiebler]

Sailor Steve is correct to say that the unique 'Anti-Humming Bird' mod is present in NYGM.

However, your description suggests a possible further explanation: the 'Crash-Dive Blues', which has been well covered in previous posts (see the NYGM sticky).

Briefly, if you crash-dive, but change the crash-dive depth while you are still diving, the U-boat sinks in tail-down mode, which is hard to control, so you have to compensate by using higher, and noisier, speeds. This problem affects stock SH3, and all super-mods, but is more obvious with NYGM's anti-humming-bird mod.

There are two solutions:
1. If you crash-dive, don't change the diving depth until you reach the fixed crash-dive depth (normally 80 metres; 20 metres for Type II boats). If you make a mistake, and remember this golden rule too late, the only solution is to rise back above 80 metres, then to crash-dive a second time and allow the U-boat to level out before diving again.
2. The preferred method to fast-dive is to use the diving planes (press 'D') at flank speed (press '5'). This means you go down a little slower than with a crash-dive, but you do not have to worry about the diving depth. Just set the diving depth immediately to 160 metres (or whatever you prefer).

Crash-dive if an aircraft attacks, and allow the U-boat to reach 80 metres before you do anything else.
Fast-dive (option (2) ) when attacked by destroyers.

Stiebler.