Four.
4 seconds sound clip from the Battlestar Galactica (1978) movie soundboard.
You can hear this line at 00:10:49 in the Blu-ray version of the movie.
Quote context
[...]
- It's an ambush. And they've got enough firepower to destroy the entire fleet.
- They're jamming our transmission.
- We're not gonna make it giving them our backs.
- How many of them can you make out?
- Four.
- When I hit three, hit your reverse thrusters and maximum braking flaps.
- We'll give them a little surprise.
- Turbos, full forward thrust. Now.
[...]