Hi Cthulhus
Post #169 How To Use The Kriegsmarine Grid Numbers
Completing each patrol grid gives you 1 crew bonus point.
In this picture you can see that I am using the player objectives that can be enabled in TDW's Option file Editor Viewer.
The icon can be switched on and off as and when required from the hidden icons panel.
It will tell you when you have completed the patrol (Green) and show you a new patrol grid (Yellow).
Clicking on the yellow icon removes the message.
When all 3 patrol grids have been completed the icon will disappear automatically.
Peter