Assertion: mark vii depth charge | /r/HasProperty | tested for countermining
Facets:
value: thoroughly
type: MANNER
Source sentences:
text: The Mark II depth charge has been thoroughly tested for countermining; experiments have shown that at a distance of 50 feet from an exploding depth charge another charge will not be countermined; consequently no danger or difficulty need be expected in the successive dropping or firing of depth charges from a vessel.