We're going to be at periscope depth trying to run the show.

On this particular night she would not even come to periscope depth.

We might stay at periscope depth if the conditions are really bad.

Only then would they close in and check her out at periscope depth.

The ship had been at periscope depth for most of the day.

The ship rose to periscope depth of about 60 feet.

Unseen must come to periscope depth again soon, probably within 100 miles.

I'm calling to request to come up to periscope depth.

He didn't have to go to periscope depth near where the rescue efforts were taking place.

Periscope depth was soon regained but could not be held.

They carried on towards the north all the next day, most of the time at periscope depth.

We got an intel brief at the last periscope depth.

Tell him to come to periscope depth at a certain time for a pickup, or however you want to word it.

After 15 minutes, E9 rose to periscope depth to inspect the scene.

A few minutes later, she came to periscope depth.

Minutes later, Cheyenne was brought from two hundred feet to periscope depth.

At dawn I very cautiously came up to periscope depth, and had a look.

Permission for active prosecution if he comes to periscope depth.

They went down to periscope depth and carried on.

Then he rose to periscope depth and Bud turned on the radar.

I'm coming to periscope depth for a quick look.

It took several minutes to make it to periscope depth.

Or if they didn't, all seven of them mysteriously failed to come to periscope depth when called.

I've called them all up to periscope depth and asked them that question.