Compounds of 艇

• 補助艦艇
  (n) auxiliary vessel
• 輸送艦艇
  (n) military transport vessel
• 揚陸艦艇
  (n) landing ship
• 上陸用舟艇
  (n) landing craft
• 特殊潜航艇
  (n) special purpose submarine (esp. Japanese midget submarines used in WWII)