They were designed for the outer line of patrol during prohibition, trailing mother ships.

The trains used the outer two lines of the four.

A third, outer line was added fifteen years later.

Second, the two outer lines of the group (parallel to the common line) must be filled in.

However, the Swedish force still managed to advance, taking the outer line of defenses.

The outer lines had been designed for that purpose.

The outer lines of the town have been measured several times, giving an area from 62.23 to 64 square miles (161 to 166 km2).

Meanwhile the length of the outer line kept growing.

Wickwrackscar knew the password of course, and they were past the outer line.

We're still holding the outer line, all the way around, but we can't do that much longer.