U.S. Navy Custom Ship Cap - Aloe Class Net Laying ShipCustomizable U. S. Navy Ship Caps Originally used maintain steel anti torpedo or anti submarine nets, these net laying ships were later used in additional roles including salvage, troop and cargo transport, buoy maintenance, and service as tugboats. Ships in Class AN 6 Aloe, AN 7 Ash, AN 8 Boxwood, AN 9 Butternut, AN 10 Catalpa, AN 11 Chestnut, YN 7 Cinchona, AN 13 Buckeye, AN 14 Buckthorn, AN 15 Ebony, AN 16 Eucalyptus, AN 17 Chinquapin, AN 18 Gum