What is similar between the two kinds of maritime air masses?

Both maritime polar and maritime tropical air masses originate over oceans, which gives them high moisture content. They influence weather patterns in adjacent land areas, typically bringing precipitation and increased humidity. Additionally, both types of maritime air masses can interact with other air masses, leading to various weather phenomena, such as storms or cloud formation. Their temperature characteristics vary; however, they share the common trait of being influenced by the oceanic environment.