Assertion: effective depth charge | /r/HasProperty | the type d
Facets:
Source sentences:
text: The first effective depth charge, the "Type D", became available in January 1916.
text: The first effective depth charge (Type D) was the 300-pound (140 kg) barrel-like casing containing high explosives, normally TNT being developed in 1916.
text: The first effective depth charge, the Type D, became available in January 1916.