1939-1945 20esiècle 20thcentury aidesàlanavigation aidstonavigation aplicación aplicación application armementdesnavires atlantiquenord campagnesetbatailles campaigns canadian civil condicionesdetrabajo conditionsdetravail conveniodelaoit conventiondel'oit convois(marine) electronicsinnavigation engineering etc formation general gestion guerremondiale histoire history iloconvention industrialhealth inspeccióndeltrabajo inspeccióndeltrabajo inspection inspectiondutravail instrumentsnautiques laborinspection labourinspection lawandlegislation laws legalstatus manningofvessels marin marinamercante marine marineecology marino marins(marinemarchande) maritimelaw mecanismodecontrol merchantmarine merchantmariners mesures mécanismedecontrôle nauticalinstruments naval navalconvoys navaloperations navigation northatlanticocean officers officiersdelamarinemarchande offshorestructures opérationsnavalescanadiennes personalnarratives personnelmanagement pictorial récitspersonnelscanadiens safety safetymeasures seafarer seamanship seatransport seguridad sécurité shipbuilding shipping ships supervisorymachinery sécurité technology trainingof transportation transportemarítimo transportmaritime workingconditions worldwar électroniqueennavigation