I rise and fall as boats stall over mountain ridges and trolls fidges stone by stone built up in rome just to fall back down in london

Red lines cross on blue, framed in white. Built from older flags, stitched into one. Raised on ships and over castles. Say 'together' first, then a common bird, then captain’s first name.

Amidst the vast ocean blue, a tiny friend in view. Not a mountain, not a plain, just a dot in the nautical domain.

Oh my stars! A whirling dancer of the plains, Kicking up dust and leaving no remains. A funnel of fury, swift as a fox, Spinning its way through fields and rocks.

I’m a contained body of water, often manmade. Add an F to my beginning and I’m unreliable. Add a B to my beginning, and I’m a name for both males and females.