It was superseded by a 'buoy and nipper' device, whereby when the lead touched bottom a nipper attached to a surface buoy marked the length of line run out.
Yalandelwa yinqanawa edadayo neniphi apho ibisithi inkosi yakufikelela phantsi iniphi ibotshelelwe kwinqanawa edadayo engaphezulu ebonisa ubude bomgca obaleka phandle.