I think that is court type is "Deck Court" Deck court was an intermediate level between Mast (NJP by today's UCMJ) and Summary Court Martial.
Looking at the 1942 Seaman's Handbook (I might have a WWI version at home, not sure though), officers charging enlisted by Mast could not fine them money.
Quote:
Mast punishments. Under Article 24 of Articles for the Government of the Navy, the Commanding Officer is restricted to certain definite punishments which he may administer at mast. These punishments consist of any one, or part of any one, of the following:
[ol]
Reduction of any rating established by himself.Confinement not exceeding 10 days, unless further confinement is necessary, in the case of a prisoner to be tried by court-martial.Solitary confinement, on bread and water, not exceeding 5 days.Solitary confinement not exceeding 7 days.Deprivation of liberty on shore.Extra duties.[/ol]
Deck Court could fine the offender, but was usually carried out when the CO viewed the offense as being serious enough to warrant more than Mast. This tells me that there was either an AWOL (UA by today's standards) issue in the company (everyone came back late and they all got nailed) or Great Great Uncle was a bit of a handful and this was not his first time standing before the CO for an infraction.