[spike12]

No periscope observations(can't see anything in the rain at night anyway)just used the map,the hydrophone bearings and the marker,marked the 1st point then marked the 2nd point 3 minutes later,used the ruler to measure the distance,and used the nomograph to calculate the speed(minutes+distance=speed).Then i manually inputed the speed on the TDC,set the AOB to 90 degrees,adjusted the bearing to get the gyroangle to 0 dedrees(depending on the speed for the torps.I recomend slow setting)waited for hydrophone line to land on the suggested bearing and fired.No periscope needed.And a good challenge.