The phrase "a navigation aid" is correct and usable in written English.
It can be used when referring to a tool or resource that helps someone find their way or understand directions, often in the context of travel or technology.
Example: "The new app serves as a navigation aid, guiding users through the city with real-time directions."
Alternatives: "a guiding tool" or "a directional resource."
Though no longer used as a navigation aid, it is a popular park attraction.
An oil tanker slammed into a light tower off Staten Island, hobbling a navigation aid that helps watch over the main shipping lanes to New York Harbor, the Coast Guard said yesterday.
A reversal could knock out power grids, hurt astronauts and satellites, widen atmospheric ozone holes, send polar auroras flashing to the equator and confuse birds, fish and migratory animals that rely on the steadiness of the magnetic field as a navigation aid.
Goodman et al. [44] discovered that a navigation aid based around landmarks is particularly useful for elderly people.
A navigation aid consisted of a floating beacon that indicated the general direction to the destination and its current distance (Fig. 1b).
Some differences were observed based on whether the participant used a navigation aid or not and also the type of the aid.
Kõpu Lighthouse only lost its important role as a primary navigation aid in 1997, when a radar lighthouse took over its duties.
If wayfinders seek information to inform a decision before entering an intersection, navigation aid requests should occur in path segments, not in intersections; furthermore, requests should predict an approach to (rather than departure from) an intersection.
But in late 2009 engineers noticed that satellite-positioning receivers for a new navigation aid at Newark airport in New Jersey were suffering brief daily breaks in reception.
There is a radio navigation aid provided at the Kamloops Airport which is used by pilots on aircraft coming from other nearby airports to determine their location.
A correlation velocity log (CVL) is an ultrasonic navigation aid for marine applications, in which velocity is estimated using an acoustic transmitter and a receiver array.
