1.
A weapon or piece of equipment that has a ~ system is able to guide itself to a target or to give out a signal that guides people to it.
All the royal cars are fitted with electronic ~ devices.
ADJ: ADJ n
2.
An animal that has a ~ instinct has the ability to remember and return to a place where it has been in the past.
Then the pigeons flew into thick fog, and the famous ~ instinct failed.
ADJ: ADJ n