"U-66" was also supposed to be patrolling off the Firth of Forth but had been forced north to a position off Peterhead by patrolling British vessels. This now brought it into contact with the 2nd Battle Squadron, coming from the Moray Firth. At 05:00, it had to crash dive when the cruiser appeared from the mist heading toward it. It was followed by another cruiser, , and eight battleships. "U-66" got within of the battleships preparing to fire, but was forced to dive by an approaching destroyer and missed the opportunity. At 06:35, it reported eight battleships and cruisers heading north.