борт о борт означает в английский

abreast▼(nautical: side by side; also, opposite; over against; on a line with the vessel's beam)
adverb
[UK: ə.ˈbrest] [US: ə.ˈbrest]

side by side▼(literally)
adverb
[UK: saɪd baɪ saɪd] [US: ˈsaɪd baɪ ˈsaɪd]