Design 418 174 Navy Harbor Tanker

These vessels were built of welded steel and were designed to carry gasoline, heavy oil, water and in later designs mixed liquid cargo. These boats were normally designated YO (oil), YOG (gasoline) or YM (water). Typical capacities were 6,500 barrels of gasoline and 5,000 barrels of heavy oil. They were intended for harbor service but were classed for coastwise service by A.B.S. (American