Definition
A NOTAM contraction used in aeronautical publications and notices to indicate the period between sunrise and sunset, often used to specify when an airport service, lighting requirement, or operational restriction applies.
Plain English
Short for 'daylight.' It marks the hours from sunrise to sunset, used in notices to say when something is or isn't available.
Context Anchor
Seen in NOTAMs, airport remarks, and other shortened FAA text where space is limited.
Derivation
DALGT is a shortened form of “daylight.” The contraction keeps the main parts of the word while making it short enough for compact aviation messages.
Why Pilots Care
It tells pilots exactly when daylight-dependent rules, restrictions, or operations apply.
Intuition Check
Do not assume DALGT means “good visibility” or “safe daytime weather.” It only points to the daylight portion of the day; weather and visibility must still be checked separately.
Example Sentence 1
The NOTAM read 'TWY B CLSD EXC DALGT,' meaning Taxiway B was closed except during daylight hours.
Example Sentence 2
Certain VFR minimums apply only DALGT in this airspace.