TR2 - Venice boat soft lock?

So, I unlocked all the doors and gates needed to get the boat through the time course up to the door just past the mines. I took the boat, went as fast as I could, blew up the mines, and for the millionth time, the door closes on me just as I swim to it. Annoying, but no biggie, I'll just load my last sa---

God. Fucking. Damnit. I press save instead of load. And now I have no boat to try again.

Am I now unable to beat the level? Do I have to start the whole level over again? Is there another boat hidden somewhere? I completely forgot where the first boat went and even if I found it I don't think I could physically get it to the part of the level I need it at.

I realize this is all my fault for not being careful but Jesus I do not want to play the whole level over again.