It's quite possible
There is X Y and Z information in there some place too, to move the objects about. I am guessing there is also "frame" information, telling it what frame to appear on.
The total data for each object is 96 bytes.
The UFO full is this:
05 00 00 00 5B 00 00 00 C7 00 00 00 30 75 00 00
E8 03 00 00 01 00 00 00 52 07 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 0A 00 00 00
00 00 00 00 00 00 00 00 05 00 00 00 00 00 00 00
00 00 00 00 86 01 00 00 00 00 00 00 00 00 00 00
00 00 00 00 2D 02 00 00 DB 01 00 00 00 00 00 00
Welcome sign is:
05 00 00 00 60 00 00 00 CC 00 00 00 00 00 00 00
00 00 00 00 01 00 00 00 4B 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
Boat is:
05 00 00 00 2C 00 00 00 0C 00 00 00 00 00 00 00
01 00 00 00 01 00 00 00 20 03 00 00 00 00 00 00
39 03 00 00 00 00 00 00 1E 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 03 00 00 00 64 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 EA 01 00 00 00 00 00 00
Try documenting some of the stuff for me.
What we know is:
Byte 5-6: image/model visual?
Byte 13-14: Related to movement speed
Byte 17-18: Points allocated
Byte 45: When set to 0A, model rotates. May be rotation speed.
Byte 57: ID (00 enemy/model cannot be collected
01 normal
02 unknown
03 points continuously added on when energy is less than 0
04 unknown
05 Spaceship only, probably tells it to explode).
Byte 85-86: Energy
The data is there for its X Y Z, frame position, because if you copy the ship data to the welcome sign, you get no sign, but you do get 2 ships instead of 1 at the same time.