 At 18 : 30 on 29 January , two corvettes from the Royal New Zealand Navy , Moa and Kiwi , intercepted the Japanese submarine I @-@ 1 , which was attempting a supply run , off of Kamimbo on Guadalcanal . The two corvettes rammed and sank I @-@ 1 after a 90 @-@ minute battle ( 09 ° 13 ′ S 159 ° 40 ′ E ) . 
