An Onboard Locational Device; Anagram of "a Divan"

This page is the CodyCross answer for the clue below from Inside the Spaceship, Group 1183, Puzzle 4 (Competitive Game).

Question is: An Onboard Locational Device; Anagram of "a Divan"

and the answer is: NAVAID

Word Meaning:

NAVAID — (particularly nautical, aviation) Any form of aid to navigation such as a lighthouse or ILS (instrument landing system).

Definitions from Wiktionary.