Middle grounds

urn:mrn:iala:dic:1-2-0230

Island or shoal which divides a fairway into two shipping channels; these subsequently join again into a single channel.

Reference: I.H.B. (modified)

Please note that this is the term as it stands in the original IALA Dictionary edition (1970-1989)

English

charge current

Intensity

Centre of buoyancy

International Association of Marine Aids to Navigation and Lighthouse Authorities - AISM