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5 The Darkvision spell, by default, can target only one creature and gains no benefit from upcasting (= using a spell slot higher than the spell's level). You touch a willing creature to grant it the ability to see in the dark. For the duration, that creature has darkvision out to a range of 60 feet. Since my level 7 moon druid has two party members without darkvision, I asked my DM if he could allow me to cast darkvision at higher levels to target additional creatures; more precisely, one additional target for each spell slot level above 2nd (similar to spells like Charm Person or Hold Person ). For example, if cast at 3rd level, I can target two creatures, while casting it at 5th level would allow me to target 4 creatures, and so on. Anyways, he did choose to allow it, and I've used it a number of

Branch of naval warfare Royal Navy officers on the bridge of a destroyer on convoy escort duties keep a sharp look out for enemy submarines during the Battle of the Atlantic, October 1941 Anti-submarine warfare ( ASW , or in older form A/S ) is a branch of underwater warfare that uses surface warships, aircraft, or other submarines to find, track, and deter, damage, or destroy enemy submarines. Successful anti-submarine warfare depends on a mix of sensor and weapon technology, training, and experience. Sophisticated sonar equipment for first detecting, then classifying, locating, and tracking the target submarine is a key element of ASW. To destroy submarines, both torpedos and naval mines are used, launched from air, surface, and underwater platforms. ASW also involves protecting friendly ships. Contents 1 History 1.1 World War I 1.2 Inter-war period 1.3 World War II 1.3.1 Battle of the Atlantic 1.3.2 Mediterranean 1.3.3 Pacific Theatre