LAKELAB and PORTALAB were both student proj- 
ects and are small, Spartan, and dependent on shore 
support. It is questionable if either would be readily 
adaptable to the saturation diving missions generally 
conducted from habitats. 
All existing habitats can be considered transport- 
able, that is, they can be moved from place to place 
with varying degrees of difficulty. However, none is 
mobile—capable of changing location by perhaps 1 
or 2 miles under its own power during a mission. 
There are only five habitats (AEGIR, EDALHAB, 
HYDROLAB, PRINUL, and TEKTITE) known to 
be able to support saturation diving and equipped 
at this time for research and investigations. Two 
others (LAKELAB and PORTALAB) may be usable 
for special operations. For inventory and statistical 
purposes, it was decided to consider LAKELAB, 
PORTALAB, and other small chambers as_ the 
equivalent capability of one habitat, making a total 
of six habitats. This “one” and two others (EDAL- 
HAB and PRINUL) will have been used about one- 
third of their available time. Two habitats (AEGIR 
and TEKTITE) have not been used since mid-1971. 
The HYDROLAB is being used by NOAA- 
Habitat TEKTITE Il 
