This is a list of all the hull numbers that have special properties.
Everything except Cloaking can be turned off by recofiguring your host
settings.

Most of these special features apply only to Host version 3.2.

3       Can Terraform (increases temp to 50)
7       Uncloaks all cloaked ships within 10ly
8       Can Terraform (reduces temp to 50)
9       Bioscanner
21      Cloaks
22      Cloaks
25      Cloaks
26      Cloaks
27      Cloaks
28      Cloaks
29      Cloaks
31      Cloaks
32      Cloaks
33      Cloaks
36      Cloaks
38      Cloaks
39      Has glory device
41      Has glory device
42      Pleasure ship. Produce 1 megacredit for every clan on board
43      Cloaks
44      Cloaks, Gravatonic accelerator
45      Cloaks, Gravatonic accelerator 
46      Cloaks, Gravatonic accelerator
47      Cloaks
51      Can hyperjump
56      Warp chunneling
64      Can terraform (increases temp to 100 though)
69      Can perform the Imperial Assault mission
77      Can hyperjump
84      Bioscanner
87      Can hyperjump
96      Bioscanner, and will scoop fuel from space as it moves.
97      Converts minerals to fuel
104     Makes fuel from supplies and minerals
105     Makes minerals from supplies
