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Old 11-15-2016, 04:21 PM   #1
Bilge Rat
Join Date: Nov 2016
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Default Angle of Bow using map only


I'm new to submarine simulators. I'm enjoying HMS Marulken immensely. I like that we have to dial in everything manually. I hope they don't make Wolfpack too easy by slaving the periscope to the torpedo direction... Anyways...

I need help with determining the angle of bow using only the map in HMS Marulken. I came up with a solution, but i'm not sure it's correct.

Here is what i came up with, please help me verify it.

0. Full stop.
1. Take a distance measurement and angle of enemy ship.
2. Draw a line using that angle and distance from the sub to the position of the ship.
3. Wait 1-2 minute.
4. Take a new distance measurement of the same ship.
5. Draw a line to the new ship position using the new angle and distance.

Here is where it gets tricky...

My logic : If the new position is on top of the line of the old position, then it means the enemy ship is either moving towards us or away from us, at a perfect 180 or 0 angle. Using this fact, i calculate the offset angle between the 2 point using the following method. If i'm wrong, please be very descriptive in how to fix it. words are hard when talking geometry.

6. place cursor on position 1.
7. get the angle from position 1 to the submarine. (for reference)
this should be the opposite of the measurement in step 1.
8. draw a line from position 1 to position 2.
9. note the angle once at position 2.
10. angle of position 2 - angle of position 1 = offset. note that offset.
11. If the ship moved to the east: 0 + offset = angle of bow.
12. If the ship moved to the west: 360 - offset = angle of bow.

Short version :

Take 2 positions of the enemy ship.
if he was at a 0 angle towards you, the new position would be on the same line. Because it's most likely not, measure the angle Ship-Point1-Point2.
If the ship moved east do 0 + angle. If he moved west, 360 - angle.

Bonus question :

What speed do the torpedo moves in this game ?
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