Mines where a number of buoyant mine cases are attached to the same sinker; when the mooring of one mine case is cut by a sweep, another mine case rises from the sinker to its set depth
Imigodi apho inani leebhombu ezidadayo zincanyatheliswe kwilothe yomtya wokuloba, xa ukubotshelelwa kwebhombu enye kuqhawulwa sisikhukulisi, enye ibhombu iphekama ukusuka phantsi kwilothe yomtya wokuloba