Walker was a tactical innovator, his ships' crews were highly trained and the presence of an escort carrier meant U-boats were frequently sighted and forced to dive before they could get close to the convoy.
Walker var taktisk opfindsom, hans skibsbesætninger godt trænet, og tilstedeværelsen af et eskortehangarskib betød, at ubådene ofte blev set og tvunget til at dykke, før de kunne komme tæt på konvojen.