David's grandfather had a brother named Robert who was a fireman/stoker on the Titanic.

Here's what we found on-line about Great-Uncle Bob.

There were 13 leading firemen (Stoker Foremen) and 163 firemen (Stokers) assigned to the Titanic. The ship had 29 boilers, each containing three furnaces for a total of 159 furnaces. Each fireman was assigned one boiler and three furnaces. Of the Titanic's six boiler rooms, each leading fireman was assigned to two of them with 10 to 15 firemen under him. Next to each boiler was a coal chute that deposited coal from the overhead coal bunkers, and a fireman with a shovel would constantly feed coal into the three furnaces. Shifts for all the firemen and their foremen were four hours on and eight hours off. The heat in the boiler rooms usually exceeded 120F degrees, so a four-hour shift was very demanding. Most of the firemen worked wearing only their undershirts and shorts. Of the firemen, only three leading firemen and around 45 other firemen survived. Several of the firemen that survived got into the lifeboats dressed only in their undershirts and shorts in 28F degree weather.^[4]