YT – Yard Tug
	YT-109 Peoria			mod. AT-48 Peoria Class
	YT-110 Uncas			mod. AT-51 Uncas Class
	YT-111			mod. AT-53 Class
	YT-121 Arapaho			mod. AT-14 Arapaho Class
	YT-123 Wando			mod. AT-17 Wando Class
	YT-125 Undaunted			mod. AT-58 Undaunted Class
	YT-126 Challenge			mod. AT-59 Challenge Class
	YT-135 Cahokia			mod. AT-61 Cahokia Class
	YT-138 Woban
	YT-172 Sparrow	-	-	mod. AMc-31 Sparrow Class
	YT-265 Hiawatha
	YT-341 Tuscarora	1942	1944	mod. AT-77 Tuscarora Class
	YT-354 Sassa
YTB – Yard Tug, Large
	YTB-123 Wando			mod. YT-123 Wando Class mod. AT-17 Wando Class
	YTB-135 Cahokia			mod. YT-135 Cahokia Class mod. AT-61 Cahokia Class
	YTB-265 Hiawatha			mod. YT-265 Hiawatha Class
	YTB-341 Tuscarora	1944	1953	mod. YT-341 Tuscarora Class mod. AT-77 Tuscarora Class
	YTB-752 Edenshaw
	YTB-760 Natick
YTM – Yard Tug, Medium
	YTM-122 Tillamook			mod. YT-121 Arapaho Class mod. AT-14 Arapaho Class
	YTM-126 Challenge			mod. YT-126 Challenge mod. AT-59 Challenge Class
	YTM-138 Woban			mod. YT-138 Woban Class
	YTM-265 Hiawatha			mod. YTB-265 Hiawatha Class
	YTM-354 Sassa			mod. YT-354 Sassa Class
	YTM-748 Yuma
	YTM-759			mod. Army LT
YTL – Yard Tug, Light