How an early-1910s warship called action stations

How were action stations called aboard warships in the early 1910s?

By a combination of pipes or bugles, alarms, voice tubes, and loud verbal repetition by senior ratings.

Early-twentieth-century warships did not rely on a single communications method to call action stations. Small ships could use a pipe signal, while larger ships might employ a bugle or other distinctive alarm. Voice pipes carried spoken orders to important stations. Chiefs and other senior ratings then repeated the command loudly through their compartments. The overlap created redundancy in a noisy ship where any one channel might fail or be missed.