What does LOB stand for in SAR planning?

• A. Line of Bearing
• B. Limit of Beacons
• C. Lateral of Bathymetry
• D. Log of Base

Answer: (B)

LOB stands for Line of Bearing. In SAR planning, this means the direction from an observer toward the signal or target, drawn as a line on the map. Each bearing you obtain from a search asset creates a line; where two or more lines intersect helps pinpoint the probable location of the target. If you only have one bearing, you know the target lies somewhere along that line and you can orient search efforts along that direction, often refining with drift models or additional clues. The other terms don’t represent a navigational construct used to locate a signal or object in SAR planning, so they don’t fit the context.