Submarine mining was the laying of defensive mines on the seabed about port entrances., but in the 1898 plans for new ships, "Ellen Ballance" was described as dangerous to use for laying out mines in anything approaching bad weather.
Submarine mining was the laying of defensive mines on the seabed about port entrances. In 1898 the NZ forces commander advised the government that "Ellen Ballance" was dangerous for laying out mines in anything approaching bad weather.