Seamen health guides may cut costs.
D006262:Health; D006264:Health Benefit Plans, Employee / Q000191:economics*; D006801:Humans; D007348:Insurance, Health / Q000191:economics*; D010559:Personnel Management / Q000592:standards*; D010560:Personnel Selection / Q000592:standards*; D012767:Ships; D014481:United States; D014492:United States Public Health Service