There is no per diem entitlement when TDY aboard a US vessel, since quarters and messing are provided. The Government normally provides all transportation, lodging, and meals during Group Movement travel between duty locations. Consequently, there is no per diem entitlement for such travel. Training exercises, operations, maneuvers, war games, and similar types of activities may be classified as Field Duty when everything is furnished without charge. There is no per diem entitlement during Field Duty.
Lodging is provided free of charge.
Civilians are entitled to reimbursement of the amount paid for food.