What's that mean?

1 seconds sound clip from the The Hunt for Red October movie soundboard.

You can hear this line at 01:36:05.008 in the Blu-ray version of the movie.

Quote context

[...]

- Shall I open the torpedo tube door, sir? Captain, shall I open outer doors?

- No. Lock the firing solution into the computer. Do not open the doors.

- Aye, Captain.

- Lock solution into computer.

- Conn, Sonar. Target's flooded his tubes.

- Has he opened his outer doors?

- Negative, Captain. He's just sitting there.

- Hold on. Hull popping. Target's coming shallow.

- What's that mean?

- That means he's a very cool customer, your Russian. He knows we're here, we're ready to shoot. He's not going to provoke us.

- He's heading to periscope depth to see what's on the surface. What's his course now?

- Course is 2-7-0, Captain, due west.

- Bring us alongside him.

- Aye, aye, Captain.

- Sonar, Conn. Report all contacts.

- Conn, Sonar. My only contact is Typhoon Seven, bearing 1-9-5.

[...]