Another Musical Mystery: Lifeboat Crew

Google turns up next to nothing on another one of the songs on my list; here are the lyrics in full for this short, lively tune:

Oh, the lifeboat crew are we
And we sail the stormy sea
Oh the ocean waves they roll

We heed our captain's call
Man the lifeboats one and all
And away goes the lifeboat crew

Can anyone solve this mystery or shed a little light upon it?