We had been taught to fire, then leapfrog back to the end of the patrol line.

Before the first minute was past they were racing through the patrol line.

So Blade set up a patrol line off the coast.

Mainz was initially stationed in support of the forces on the patrol line.

"Would we be sailing in daylight, right through the patrol lines, if we had no papers?"

U-353 was the seventh or eighth boat in the patrol line and remained in position for a week.

The second part involved the boat as part of a patrol line, along with U-23 and U-24.

Khadaji slowed to a walk when he was a kilometer from the patrol line.

Next time we'll deploy the patrol line farther out and do a direct penetration.

Makes sense that they'd have a patrol line offshore.