Bridge Equıpment

When ship grounding we need to take sounding from ship sides for designate grounding area. So is there any regulation for sounding devıce or is it need to be bridge ?

A lead and line was a standard item of bridge equipment and in most ships was stowed under the settee on the bridge. The only time I have used one was after running aground up the Amazon to sound around the ship.

But is it mandatory equıpment? Is there any regulation about it. Why we can not use manual sounding equıpments which is placed on deck