I may as well confess at once to the fact that when I was asked to lecture some time ago the term “Airmanship at Sea” was selected as the title whilst my subject was still at the back of my mind. On settling down to my task, however, I found that the field was too wide for me to attempt to cover it conveniently in one paper. I propose, therefore, with your kind permission, to confine my remarks to that part of airmanship which concerns the handling and maintenance of seaplanes on the water, or as has been suggested to me the “harbour” side, rather than the “deep sea” side, which covers rising from the sea and landing, flying over the sea, and the many important air duties the pilot must be master of before proceeding on patrol, reconnaissance or a bombing expedition. I trust that I shall be forgiven if it is found necessary to deviate into side issues occasionally for the purposes of illustration and comprehensive understanding.