Plain English Meaning

An approach that uses a localizer-style ground signal to guide you toward the airport, but the course doesn't line up straight with a runway, so it gets a letter name (B) instead of a runway number. The 'B' just means it's the second approach of this kind at that airport.

Full Definition

An instrument approach procedure that uses a Localizer-type Directional Aid for lateral guidance, designated with the identifier letter 'B'. The letter 'B' is assigned because the approach does not meet the alignment or descent criteria required to be named for a specific runway, and it is the second such non-runway-aligned approach (after 'A') published at that airport. An LDA provides course guidance similar to an ILS localizer but is not aligned with a runway centerline within the standard .