[adrians69]

TMO 2.5, no map contact updates & manual targeting. I get speed taking 2 range readings and plot on the map which also gives target course and from there you can work out AOB at your planned shoot bearing. I don't use PK, just set up the shoot bearing/range/speed etc and wait for my unfortunate prey to sail into my cross hair. In bad weather/rough seas etc. when the target cannot be seen I plot target course and range entirely with the hydrophone using the 4 bearings method.