 The Martin AM Mauler ( originally XBTM ) was a single @-@ seat shipboard attack aircraft built for the United States Navy . Designed during World War II , the Mauler encountered development delays and did not enter service until 1948 in small numbers . The aircraft proved troublesome and remained in front @-@ line service only until 1950 , when the Navy switched to the smaller and simpler Douglas AD Skyraider . Maulers remained in reserve squadrons until 1953 . A few were built as AM @-@ 1Q electronic @-@ warfare aircraft with an additional crewman in the fuselage . 
