Multipurpose spanner for marine fire hose coupling

A multipurpose spanner for marine fire hose couplings is provided to allow workers to easily fasten or release ANSI(American National Standards Institute) couplings by adding an auxiliary spanner member to the multipurpose spanner. A multipurpose spanner for marine fire hose couplings comprises a fixing member(10), a connection member(20), a handle member(30), and an auxiliary spanner member. The fixing member has a locking hook(11) coupled with a locking protrusion of the marine fire hose coupling. The connection member has an arc shape and one side of the connection member is connected to the fixing member. The handle member rotates at the other side of the connection member. A gripping section(31) is formed at the other side of the handle member. The auxiliary spanner member is installed at the other side of the handle member.