[Sir Francis Dashwood]

Some cruise missiles have a single jet engine.

Commercial aircraft have 2, 3, or 4 engines.

I see only one contrail...

WHY DOES EVERYONE ASSUME A MISSILE CANNOT USE A JET ENGINE?

Why does everyone assume that a submarine cannot surface and deploy a cruise missile with a jet engine?

Why does anyone not realize we have cruise missiles with jet engines?

Why would anyone think somebody else does not?

Wasn’t the old German V-1 a jet propelled missile?

[justa-hairyape]

Thanks for the info. Do you think there is any possibility they were testing a super sonic cruise missile ? Assuming it had a starting rocket phase to get to a safe test altitude and then the rocket engine kicks in and off it went over the open Pacific.

[muawiyah]

With a blast zone 3200 feet wide, that particular rocket would require an ENORMOUS submarine to move it into place for launch.

Again, when examination of the image leads you to a belief that's simply contrary to what you know (Miles long submarines are fiction) then you have to revise your thesis.