re: 'If all goes well...' Titanic victim's letter expected to sell for thousands

Speaking of The Titanic, I read recently (don't remember source/can't confirm) a "Fact" I was never previously aware of:

Apparently, the crewman who was to be the "lookout/ man the Crow's Nest" was switched out with another employee literally just before leaving port. In the rush to swap out, the original lookout forgot to remove the key to the locker in the crow's nest from his neck before disembarking. His replacement was therefore unable to retrieve the binocs from the locker the entire cruise...which directly contributed not only to not seeing the berg in time, but also poor visibility of it's massive water-line width until they were right upon it, powerless to avoid catastrophe having committed to the turn. Those precious extra seconds/ info not could but would have impressed upon the experienced captain that there was no way to avoid damaging the expensive ship, and the head-on collision with full reverse engines would have been the call without hesitation.

Anyone else heard this? True? BS?