Definition
A specified location along a communications or navigation circuit where signal data, voice traffic, or message content can be removed (dropped) from the circuit or added (inserted) into it without disrupting the rest of the circuit's flow.
Plain English
A point on a communication line where information can be taken off or added on without affecting anything else moving through that line.
Context Anchor
Seen in FAA acronym lists, technical notices, and communications-infrastructure references rather than as a normal cockpit term.
Derivation
From the telecommunications phrase 'drop and insert,' which describes how a signal can be 'dropped off' at a midpoint or have new content 'inserted' into the stream — much like a passenger getting off or boarding a bus mid-route.
Why Pilots Care
Allows controllers to manage sector handoffs cleanly so flights move between airspaces without losing track or creating gaps in coverage.
Analogy
Think of it like an exit and entrance ramp for information on a main road: some information leaves the main path at that point, and other information joins it there.
Intuition Check
“Drop” does not mean dropping something from an aircraft. Here, it means removing a selected signal from a communications line; “insert” means adding a signal onto that line.
Example Sentence 1
The technician identified the DIP on the circuit so that the local facility could receive its share of the data feed.
Example Sentence 2
Reviewing the NOTAM showed the DIP location had changed due to temporary airspace restrictions.