Answer: tradewind

AnswerCrossword Clue
TRADEWIND

Tropical cooler

TRADEWIND

Equatorial zephyr.

TRADEWIND

Boon to navigators.

TRADEWIND
Monsoon's relative.
TRADEWIND
Mariner's concern.
TRADEWINDHorse latitudes feature
TRADEWINDAir movement on one regular course
TRADEWINDIt continually moves in the same direction