Caterpillar engaging, Captain.

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

You can hear this line at 00:28:39.065 in the Blu-ray version of the movie.

Quote context

[...]

- We will pass through the American patrols, pass their sonar nets, and lay off their largest city and listen to their rock 'n' roll while we conduct missile drills.

- Then... and when we are finished, the only sound they will hear is our laughter while we sail to Havana, where the sun is warm and so is the comradeship.

- Cryogenic plant coming on line, Captain.

- A great day, comrades. We sail into history.

- Caterpillar engaging.

- Caterpillar engaging, Captain.

- What happened?

- I don't know.

- Full rudder left.

- Full rudder left.

- Navigator. New course, 2-5-0.

- Yes, new course, 2-5-0.

- Steering 2-5-0. Yes, course is 2-5-0.

- Sonar contact, Captain. Port quarter. Close aboard. American, Los Angeles class.

[...]