English to Spanish Other Ships, Sailing, Maritime Naval Terminology/Acronyms

Hi all,

The context:
A Situational Report Notepad describing how things went down while interdicting a ship. In the sentence, they´re basically saying they launched a vessel with 5 people to interdict the suspicious vessel, but with military acronyms.

The sentence:
WALT 1 UNDERWAY 05 POB GAR LOW MEDIUM.

Walt = still waiting for confirmation on this one.
POB = person on board
GAR = "gateway access request" according to the Department of Defense Acronyms list I´ve got. makes sense to attribute this one since it´s a military operation. I´m guessing "LOW MEDIUM" describes the risk/danger of the mission they´ve set out to.

What Spanish expression could fit this scenario?

Thanks in advance.