The hatch cover has a rubber sealing strip let into its inner side where it bears on the edge of the coaming, so that, when clamped down by means of wing nuts working on threaded bolts hinged to the coaming, the hatch cover makes a watertight joint with the coaming .
Isigqubuthelo sesivalo sinesivingco serabha elapha emacaleni kumphetho ophakamileyo wokunqanda amanzi angangeni emngxunyeni ekulayishwa ngayo inqanawa, ukwenzela ukuba, xa ithe yacinezelwa ngemortyisi esebenza kumaqweqwe ebholiti zehenjisi ekumphetho wokunqanda amanzi angangeni emngxunyeni, isigqubuthelo sesivalo sidibanisa umphetho ophakamileyo wokunqanda amanzi ekubeni angangeni emngxunyeni.