Most likely immersion suits, practicing safety drills .
Flags probably not any real message.
Have fun decoding.
With the red/white/blue I would say that the ship is just 'dressed' for a dignity.
If it was Morse code the spacing should be more consistent. One unit between each element of a letter and say two between each individual letter.
I was not disagreeing with the message, I was just suggesting that it be treated with some caution.