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Originally Posted by black1
Ok i get it now, took me a while but thanks for the help. When using "no map contact updates" do you guys go to periscope depth when contact reported and listen for bearing and judge heading by marking with pencil?
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Even with no map updates, a reported contact will show on your map ... along with time of report and general heading/speed information. The easiest way to intercept the contact (for me, anyway) is:
- Draw a course line (e.g. "Course: NE" = 045) from the contact point, outward.
- Match the contact's reported speed.
- Set your heading to intercept the contact's course line.
- Make sure your course line to intercept is shorter than the contact's.
If your course line is too long, either adjust it or speed up to compensate.
There is no need to worry about "yards" when plotting an intercept unless your contact is less than 5 nm away. All distances will be in nautical miles and all speeds will be in knots. Ergo, you can even calculate how long it will take you (or the contact) to reach the intercept point (distance/speed).
For sonar contacts, I use a different method.