Bruno,it must have been something to crawl there and I am sure its a water tight bkh like welded to the structure with the bulb in fore position.Imagine hitting a container at see full speed on the bulb ,that could be a disaster.I guess the thickness must be at least one inch or more.
The ice breaking technic seems good but like yachtluver ,man I dont like cold water
.With tecnology their must be coming up with diferent ways for the bow to be more efficient when hitting ice.
Thanks and very informative.
Francois