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TorpX · 11-30-14, 08:07 PM

I might be able to give you advice, but you need to provide more information.

Where is your patrol area?

How fast are you going?

What class of boat do you have?

Did you follow instructions in ISP regarding the special ability crew?

The Porpoise-class will have about 6,000 nm range, and later classes about 11,000 nm range (@ 10 kn.). The S-class will have less. You should be able to obtain these figures, and if you don't do much battery charging, or see a lot of bad weather, something better than that.

Really, at the start of your patrol, you should 'test' your engines, and have your navigator give you the maximum ranges at the different speeds, so you know. After that, it is a simple matter to calculate what you will use as you transit from one area to another.

For instance, I got the following info for my S-18 class:
at A 1/3 (5.75 kn.) _______9850 nm
at A 2/3 (8.5 kn.) ________4884 nm
at A Standard (10.25 kn.)___3472 nm

These figures were for wind conditions of 5 m/s, so the speeds are slightly lower, but that is ok.

This was at the start, so I know at 1/3, I get 98 nm per point of fuel, and at 2/3, only 48 nm per point, etc., etc.

Knowing how far you have to go to get where you are going (and to get back), you know how much you need. You should always have some extra for contingencies. As a general rule, you don't want to be running submerged, or using high speeds, unless you have a good reason. BTW, running submerged because you are in enemy waters, and you don't want to be bombed and strafed, is a good reason, doing so near Hawaii, just because you feel like it, is not.

When you get to your patrol area, you should operate within a reasonable fuel budget; i.e. not waste fuel. It you are operating within tight limits, there are ways to stretch your fuel.

11-30-14, 08:07 PM	#3
TorpX Silent Hunter Join Date: Sep 2010 Posts: 3,975 Downloads: 153 Uploads: 11	I might be able to give you advice, but you need to provide more information. Where is your patrol area? How fast are you going? What class of boat do you have? Did you follow instructions in ISP regarding the special ability crew? The Porpoise-class will have about 6,000 nm range, and later classes about 11,000 nm range (@ 10 kn.). The S-class will have less. You should be able to obtain these figures, and if you don't do much battery charging, or see a lot of bad weather, something better than that. Really, at the start of your patrol, you should 'test' your engines, and have your navigator give you the maximum ranges at the different speeds, so you know. After that, it is a simple matter to calculate what you will use as you transit from one area to another. For instance, I got the following info for my S-18 class: at A 1/3 (5.75 kn.) _______9850 nm at A 2/3 (8.5 kn.) ________4884 nm at A Standard (10.25 kn.)___3472 nm These figures were for wind conditions of 5 m/s, so the speeds are slightly lower, but that is ok. This was at the start, so I know at 1/3, I get 98 nm per point of fuel, and at 2/3, only 48 nm per point, etc., etc. Knowing how far you have to go to get where you are going (and to get back), you know how much you need. You should always have some extra for contingencies. As a general rule, you don't want to be running submerged, or using high speeds, unless you have a good reason. BTW, running submerged because you are in enemy waters, and you don't want to be bombed and strafed, is a good reason, doing so near Hawaii, just because you feel like it, is not. When you get to your patrol area, you should operate within a reasonable fuel budget; i.e. not waste fuel. It you are operating within tight limits, there are ways to stretch your fuel.