ECAREG - Eastern Canada Traffic Zone Regulations
Category: - Maritime - Acronym

Edge Matching - The GIS or digital map equivalent of matching paper maps along their edges. Features that continue over the edge must be "zipped" together and the edge dissolved.
Category: - GIS

Elevation - The vertical height above a datum, in units such as metres or feet.
Category: - GIS

ELT - The emergency locator transmitter (ELT) and its marine equivalent the emergency position indicating radio beacon (EPIRB) are radio transmitters which send out radio distress signals. The transmitters can be activated either manually, or automatically. The signals are picked up by orbiting satellites (SEE SARSAT) and can be tracked by planes or boats equipped with direction finders. Since their introduction in the early 1980s, the transmitters have saved thousands of lives and drastically reduced the number and cost of large scale searches.
Category: - Maritime - Risk - Acronym

End Node - The last point in an arc that connects to another arc.
Category: - GIS

EPIRB - The emergency locator transmitter (ELT) and its marine equivalent the emergency position indicating radio beacon (EPIRB) are radio transmitters which send out radio distress signals. The transmitters can be activated either manually, or automatically. The signals are picked up by orbiting satellites (SEE SARSAT) and can be tracked by planes or boats equipped with direction finders. Since their introduction in the early 1980s, the transmitters have saved thousands of lives and drastically reduced the number and cost of large scale searches.
Category: - Maritime - Risk - Acronym

ESRI - Environmental Systems Research Institute
Category: - GIS - Acronym

ETA - Estimated time of arrival.
Category: - Maritime - Acronym

ETA - Event Tree Analysis - Starting with an initiating event, consequences of the event are followed through a series of possible paths. Each path is assigned a probability of occurrence and the probability of the various possible outcomes can be calculated
Category: - Risk - Acronym

ETD - Estimated time of departure.
Category: - Maritime - Acronym