[REL] Radar Training for Nisgeis' 3D TDC and Radar Range Unit UPDATED: 7/31/10

[Roger Dodger]

Originally Posted by John Channing

The courses are indeed true. The 88 degrees will be your torpedo track angle or the relative bearing difference between the target course and yours. This is indicated by the "arrow" coming out of your sub on the "Own Ship" dial.

Looking at the dials as they are now if I was to shoot the torpedo would have to change direction by about 20 degrees to the left and it would hit the ship on it's port bow at a very oblique angle. Bettwer to wait until the ship closes a bit and it is closer to a 90 degree angle

When I am in the chair I generally shoot when the arrow is no more than +/- 15 degrees off of the center of my boat (on the dial) and the target is roughly perpendicular to my boat (assuming you are in range). tricky but it can be done.

This is like one of those old 3-D puzzles. If you stare at it long enough, it all becomes clear!

JCC

Yeah, I think I need a cartoon or something. I'm having a really hard time visualizing this.

I just finished running the 2nd Sub School Mission. Everybody is stationary, so the set-up was pretty casual. I took three RADAR observations to start to get a good idea of where the target was, then used the scope (bridge was all wet due to a monsoon) to line up with the bearing (312T), hit the (=) key, 1/3 ahead. When headed in the right direction, came to all stop, and took two more RADAR observations. Repeated this process several times, making minor corrections as I went along. When I got to where I felt comfortable with the firing solution, fired three torpedoes and scored three hits. Pretty good for firing blind (never could see the target until I got a hit). I could never have gotten a shot using auto-targeting since I couldn't get an observation.

Final readouts from the periscope screen:
POSITION KEEPER/TORPEDO SETTINGS
Bow Torpedo's track angle: 89
Range: 917
Bow Torpedo's gyro angle: 357 (R)
Bow Torpedo's course: 312 (T)
Offset Angle: 0
FIRING OBSERVATION (RADAR)
Range: 800
Bearing: 357

Never figured out why the descreptency between the two ranges.