TW 2.2 & getting the most out of your u-boat
 

The NYGM Anti Humming Bird Mod will cause your u-boat to react more realistically when at periscope depth and reflects the real world difficulties of maintaining a given depth when close to the surface due to wave action and currents.
When at periscope depth a u-boat would be set stern heavy as it was critical, that if the u-boat did breach the surface, that the propellers remained as deep as possible to give as much push to regain depth.

The u-boat’s overall buoyancy would also be set slightly negative so as to assist against breaching the surface either by heavy wave action or from possible trim imbalances when firing a salvo of torpedoes.

As a result of the NYGM Anti Humming Bird Mod, in heavy seas, i.e. high wind speeds, maintaining periscope depth is a little more tricky, just as it should be.
It is only when the wind speeds start getting up towards and into double figures does maintaining periscope depth without breaching the surface become a concern.

You will need to pay close attention to your speed as with your crew now having to constantly adjust the dive planes to keep you at periscope depth, you will find that this will result in a speed hit and as a result of this speed hit comes a greater difficulty in maintain periscope depth. A real catch 22!

The best way to deal with the realistic difficulties of maintaining periscope depth in heavy seas is when on approach to maintain a depth closer to 20 metres and when you want to use the periscope to order a depth, this depth will be from on the spot experience as the different wind speeds and the directions will effect the u-boat differently in each situation, that allows you to see while minimising the risk of breaching the surface.

Depending on the sea state i.e. the winds mps and how far away the escorts are, as well as their direction, you could risk increasing your speed to ahead 1/3 which will make the dive planes work more effectively.

Realistically under normal weather conditions if you order all stop you will not float to the surface and into the view of the escorts. However in heavy seas there is a risk that this might occur if at periscope depth but never from 15+ metres.

As a result of the removal of SHIII Humming Bird affect a close by depth charge will have a greater effect on your u-boats ability to maintain an even keel resulting in a change of depth as your crew work to level the u-boat out.

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The combination of the NYGM Anti Humming Bird Mod & the new NYGM Submerged Endurance Mod have resulted in the weather conditions having a larger impact upon your patrol!

All the u-boats in the NYGM TW 2.2 mod will in normal sea conditions do the historical distances. For example the VIIB in 0mps winds will at ahead slow (10 knots) will sail over 17,000 kilometres. Where as in 5mps winds at ahead slow you will only make 9 knots and as a result will sail only 15,000+ kilometres.

As demonstrated above as the wind speeds increase your given speed for the ordered speed will drop and as a result you maximum distance will also be effected and is a great real world result.

You will now you will have to ensure that you have a small reserve to make it home in case the weather turns bad!

I hope that this assists you to be more successful :up:

Wow, why?

I bought the game to be Captain. So if I order periscope depth, I expect the crew to do what is needed to follow the order, without me having to micromanage all of the other controls. I have plenty of other stuff going on in the boat without having to carry out my own orders.

I think he means if you order speed then OK, you know, order knots speed. When order ahead slow then it does not go on knots speed but value of maximum as it is always been. So if waves big then it might be slower than when waves small.

This has always been.

SimNut,
LaikaFatBum is on the right track. The ordered speed is specified in the NSS_UboatName.cfg under [EngineProperties] and is a % value of the maximum speed of Ahead Flank.

If submerged at ahead slow in 5mps winds you travel at 2knots then at 15 mps that may result in a speed of 1+ knots. This is the way that all ships work in the real world.

To over come this Captains will order either a certain RPM to achieve a known speed or specify the knot speed.

It is only the speed that you need to adjust which is not an issue and your crew will do the rest such as maintain periscope depth with out any further input.


I hope this helps you understand the system better.

I'm assuming this is only for persicope depth (and less)? I wouldn't see the wind speed having an effect on a sub deeper than that - so is this the case?

Cheers,
red

It is only at periscope depth and not always. Also, as soon as you hit 20 metres any effect is immediately gone.

It is my understanding that in the real world the wave action as far as rocking is concerned could be felt as deep as 35+ metres.

Thanks DTB, my frown lines are smoothed away :) :up:

A quote from Das Boot:

Kapitan (while looking through periscope): "Watch your depth, chief!"

:yep:

Exactly. He didn't run over and tell them what to do or how to do it, he didn't have to manipulate controls, he gave them an order and relied on their expertise to carry it out.

I have experienced this and find the effect to add another dimension of difficulty and excitement to the game. Rather than getting into position and sitting and waiting, I now have to plan ahead and keep the boat moving to maintain my depth.

Last night I was hammering a small merchant with my deck gun when I got jumped by a destroyer. It was September '39, so he was setting his depth charges too shallow, but he still managed to wing me a few times. I crept under the crippled merchant (thanks to his spot lights and my observation scope, but damn the murky water!) to weather out the storm and for the first time, ordered all stop on the engines. The boat just very slowly settled down to the bottom at 90 meters, which is where I am presently as I had to stop the game in order to get some sleep.

Now if there was a way to increase time compression while sitting on or near the bottom without having to tweak the "near land" values...

But I digress. The "settling" effect might be "unsettling" for some, but I appreciate the added realism. Kudos to whoever thought this one up!

SimNut,
I believe that I have not explained myself well enough, a habit I have as I am easily distracted :lol:

When you order any depth when using NYGM TW 2.2 the crew will maintain that depth, there is no need for you to have any further input.

The exceptions are, when you have flooding and the weight is more than the dive planes can compensate for at the current speed, or when you are going too slow, say <1 knots or when effected by the wave action at periscope depth.

So what is required of you, the Captain, to rectify this? Simply order a speed, either in knots or a 'ahead ##' and the crew will automatically bring your u-boat to the correct depth.


You have made reference to in real life a captain would not have to do such and such.

In real life if a Captain (or the officer on the bridge etc) ordered a given speed then I can assure you that no one, and I do mean No One, will second guess the Captain and order a higher speed to maintain depth.

They would instead inform the Captain of the situation and then the Captain would issue updated orders which may be to go at a faster speed.

And this is exactly what you have to do with NYGM TW 2.2 :up:

No, but he did have to say something-he couldn't just ignore it.

Ahhh, that explains now the various speeds I was getting at given engine settings. Its the wind. :know: :up: Very Cool!:up: