How are maritime polar an maritime tropical alike?

Those are types of air masses.

they both are over colder land but maritime polar is over water in cold areas and continental polar is over land and in colder areas.

An air mass, noted as mP.Maritime Polar effects Northeastern America, Eastern Canada and various other locations. It is Cool and Humid in Winter (Unstable) and mild and humid in Summer.Hope this helps

Tropical maritime is a weather term referring to air masses, Tropical means warm-usually from tropical areas. maritime means moist, as in air masses that originated or travelled over a large body of...

Air masses in the tropical and subtropical regions of the world become warm and moist because atmospheric circulation causes air to linger longer there. source:...