Chapter 9 - Special Purpose Mines; WasserballoonChapter 10 - Sweep Obstructors; Explosive Conical Floats - Sprengboje C and Sprengboje D
GERMAN UNDERWATERS ORDNANCE MINES
Chapter 10 - SWEEP OBSTRUCTORS
INTRODUCTION

German sweep obstructors, laid in and around moored mine fields, are designed to cut sweep cables and prevent or hinder sweeping of the mine field. They may contain explo-sives or merely support mechanical cutters on their mooring cables. The various types of conical floats may be indistinguishable when found afloat.