
'Hookey' Walker - after Admiral Sir Harold Walker, who had a hook instead of a hand.
'Nobby' Clark - because nobby hats (top hats) were worn by the Clerks in the City of London.
'Slinger' Woods - because sailors loaded and unloaded freight with wooden slings.
'Tug' Wilson - after Admiral Sir Arthur Knyvet Wilson first demonstrated the use of tugs to bring big ships in and out of harbour.
Anybody any more? Especially 'Sharky' Ward, was he the unfortunate victim of a grisly death?