It's to audibley mark the passage of each fathom if I remember correctly. Some anchor chains will visually show this but, surprisingly, QE2's doesn't appear to show this. However I think it's more of a tradition these days as the anchor machinery will work out and display as such along with the depth equipment ships have these days (sonar etc.). Did QE2 use the bell when lowering the anchor so how many fathoms that were played out were known? Michael? I never heard or saw as such.
As my Dad says in his video description on YouTube, you can hear the anchor chains settling in the anchor chain locker on the deck below at around the 47 second mark! This is significant as it is not the actual anchor that holds a ship in place but the weight of the attached anchor chain.
Thomas
Yes - The great rumble from the anchoring process shook the bow end;
well worth getting up early to experience (on the 'Bit Beneath the Bridge')
Definitely, Thomas - the foredeck bell was rung in Geirangerfjord in August 2005 and 2008!
The black 'balloon' thingy (? it’s Name, Bob/ Reltco!!) was hoisted as well.
The cable/ chain was also marked for measuring depths.
So sorry, Mods - This is off topic....