The Admiral will compile information on Space combat, certain tactics and ship modifications. They will be in charge of disseminating information pertaining to space combat. He is also meant to be a specialist in the field and should be able to pass on his knowledge and teach other Legionaries how to fight well in the space environment.
Information on space combat will include things such as maps of the space instances, what the goal for each mission is and a FAQ area for space combat. The tactical aspect of the Admiral's job is to post techniques that have been proven to be effective in successfully completing the space instances (ie. which units to focus on, what parts of capital ships to engage, etc). A bit of information has also been released pertaining to possible ship modifications. It will be up to the Admiral to keep track of the mods, know what each of them does and be able to help individuals attain them. At some point we may add this to Ashla Expedition.
The Admiral's job is similar to that of the Raid or PvP coordinators, except that initially there will probably not be much coordinating of play. Instead the Admiral will focus on making information readily available to Ashla Legion.
If space does expand, the Admiral will then be in charge of putting together space events and get people coordinated to accomplish whatever goals may arise.