a waterproof hatch latch with a lifting ring for mounting in a hatch cover with the lift ring connected to a cam member disposed in the latch housing . the cam member carries a locking bar on its inner end which is engagable with the adjourning deck to lock the hatch . a waterproof lock tumbler is mounted in the latch housing and a slide plate connects the tumbler to the cam member to lock the lock bar in its position engaging the deck and to lock it in position one hundred eighty degrees removed from engagement . a spring is disposed in the mounting between the cam member and the housing to prevent damage to the lift ring .