 Early warning would have been provided by a Type 2 , Mark 2 , Model 1 air search radar mounted at the top of the foremast . A Type 93 passive hydrophone system would have been fitted in the bow . The ships were designed to carry three aircraft on a platform between the funnel and the mainmast . These would have consisted of one three @-@ seat Aichi E13A and two two @-@ seat Yokosuka E14Y floatplanes . They would have been launched by a pair of Kure Type 2 aircraft catapults , one on each side of the aircraft platform . The ships would have carried a total of 122 powder charges for the catapults as well as four 250 @-@ kilogram ( 550 lb ) bombs for the aircraft . 
