The seaplane belongs to both water and air, so it is read as moving between feeling and thought with ease. Dream books link it to versatility, and to landing softly in emotional situations.
Where in your waking life have you met something like this lately?
My Cosmic Code has a private dream journal. Write a dream down and the app picks out the symbols in it, shows what dream books say about them and, over time, which words recur across your entries. The journal is stored on your device only.