Dee ihe na-aga n'ihu na paragraf a - N'oge Admiral A Mostyn Field na-eje ozi dị ka onye na-enyocha mmiri n'Ụlọ Ọrụ Na-ahụ Maka Mmiri, Ụlọ Ọrụ Na-enyocha Mmiri nyere ndị njem Nimrod ngwá ọrụ
nke British Antarctic Expedition nke Ernest Shackleton duziri na 1907. Mgbe ụgbọ mmiri RMS bụ́ "Titanic" kpụchara n'afọ 1912, e hiwere òtù na-ahụ maka nchebe nke ndụ ndị mmadụ n'oké osimiri (SOLAS), e webatakwara usoro ịkọ akụkọ banyere ice na ịkọ ihe ga-eme n'ọdịnihu. N'oge Agha Iwa Mbụ, mgbe Rear-Admiral Sir John F Parry bụ Hydrographer nke Navy, Hydrographic Office mepụtara ọtụtụ eserese ọhụrụ na ngwaahịa iji kwado Royal Navy.