Playing around again with my 1/2500th scale kits. Here is an Aerie class Science vessel; which is supposedly 90 Meters in length (or 295 feet) along side the Ultra Probe from Space:1999 which is 97 Meters or (320 feet) in length.
STARDATE: 54189.7
USS Aerie (NAR-32002)
Captain Jonathan M. Talbot commanding...
While exploring the Cassiopaean star cluster, we came across another starfaring vessel. The vessels computer revealed it is something called an Ultra Probe and was sent from Earth. Our records do not show any such ship ever being launched from Earth. We are assuming that it and it's crew are from another dimension of space time and as such. We are treating it with care. The crew of the probe was found to be in a form of suspended animation and it has been decided to keep them in that state.