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Figs, i and 2 show contact non-controlled mines having the horn type of firing mechanism and attached to their automatic sinkers as they would appear on board the minelayer when ready for laying. The small wheels on each side of the sinkers at the bottom engage on the rail track laid along the minelayer's deck.
Figs. 3 and 4 show similar types of mines as they would appear when broken adrift from their moorings and floating on the surface.
Fig. 5 shows a special type of horned contact non-controlled mine adapted for discharge out of a torpedo tube of a submarine.
Figs. 6 and 7 show types of non-contact controlled mines as they would appear when broken adrift from their moorings and floating on the surface.
Fig. 8 shows the explosion of a depth charge fired at a depth of 40 feet.
