Traditionallly In Ancient Times And Use These Telegraphs Required A Pilot Wanting To Change Speed To "Ring" The Telegraph On The Bridge, Moving The Handle To A Different Position On The Dial. This Would Ring A Bell In The Engine Room And Move Their Pointer To The Position On The Dial Selected By The Bridge. The Engineers Hear The Bell And Move Their Handle To The Same Position To Signal Their Acknowledgment Of The Order, And Adjust The Engine Speed Accordingly. General Commands Include - Full Ahead, Half Ahead, Slow Ahead, Dead Slow Ahead ,Stop, Dead Slow Astern, Slow Astern, Half Astern & Full Astern. Our Telegraph Is A Displaypiece Of The Original Device From Ancient Time. It Is Now Used As A Decor & Is A Perfect For Gifts Ideas & Perfect Memorable Navy Gifts For Birthdays, Anniversary Of Marines, Retired Navy Officer, Sea-Sailors, Seafarers Etc | A Must Have For Nautical Surfing, Exploring & Surveying Lovers.