- About OST-R
- Press Room
- Programs
- Bureau of Transportation Statistics
- Intelligent Transportation Systems
- National Transportation Library
- Positioning, Navigation and Timing & Spectrum Management
- Research, Development and Technology
- Transportation Safety Institute
- University Transportation Centers
- Volpe National Transportation Systems Center
- Publications
- Library
- Contact Us
You are here
Dictionary
Ice Action On Bridge Piers:
The force required to break ice, transmitted to bridge piers and other structures in the river. Such a force could damage the structures.
(TNDOT1)
Ice Clause:
A standard clause in the chartering of ocean vessels. It dictates the course a vessel master may take if the ship is prevented from entering the loading or discharging port because of ice, or if the vessel is threatened by ice while in the port. The clause establishes right and obligations of both vessel owner and charterer if these events occur.
(USTTA1)
Ice Gorge:
A conglomeration of ice solidly packed from bank to bank which is obstructing the flow of the river and marine traffic.
(TNDOT1)
Ice Pier:
A heavily constructed cluster of piling or concrete behind which towboats moor or shelter from running ice.
(TNDOT1)
Ice Shelf:
Seaward extension of an ice sheet, floating but attached to the land on at least one side and bounded on the seaward side by a steep cliff rising 2 to 50 m or more above sea level.
(DOI3)
Ident:
A request for a pilot to activate the aircraft transponder identification feature. This will help the controller to confirm an aircraft identity or to identify an aircraft.
(FAA4)
Ident Feature:
The special feature in the Air Traffic Control Radar Beacon System (ATCRBS) equipment. It is used to immediately distinguish one displayed beacon target from other beacon targets.
(FAA4)
Identification:
The official legends "For Official Use Only" and "US Government," and other legends showing either the full name of the department, establishment, corporation, or agency by which it is used, if such title readily identifies the department, establishment, corporation, or agency concerned.
(GSA2)
Idle Thrust:
The jet thrust obtained with the engine power control level set at the stop for the least thrust position at which it can be placed.
(14CFR1)
If No Transmission Received For (Time):
Used by Air Traffic Control (ATC) in radar approaches to prefix procedures which should be followed by the pilot in event of lost communications.
(FAA4)