U-Boat speed orders - was a telegraph used?

[Reece]

Hi, was a telegraph used in U-boats to give speed orders to engine room or was it purely voice? If there was, what noise was associated with it? was it like the "ching" sound of a standard ships telegraph?:-?
Thanks.

[GoldenRivet]

well according to interrogation reports... there was a speed telegraph.

next to the speed telegraph there was a red and green light... the red light would flash until the engine room had responded to the order and set the ordered speed setting at which time it would go steady green.

I dont know if there was a bell associated with the speed telegraph, or if there was any means of inhibiting the bell sound while submerged if there was a bell at all.

perhaps a GWX team member has researched this??

[BulSoldier]

As far as i know this device was rigged with chains to translate the order.I dont know how it was in the subs.
Here its called (щамбайн) i guess it comes from german (stambain ?)