I try to carry 4 strips of medical tape stuck to the back of my emergency credit card. I think I have to check it and restock.

A submarine is subject to much higher pressure differentials than aircraft or spacecraft (and also from the wrong directions for easy repairs from the inside) and I wouldn't recommend relying on it for long. I'm not sure how speed tape would work if applied in a vacuum, but I guess most repairs like this would be done from the inside, under some pressurization. Speed tape would be better, but, if you have external thermal blankets over the hull, duct tape should do just fine. It's only 1 atmosphere, after all (0.25 if you can do pure oxygen).

Eventually, when you stop by a proper facility, you'll want to do something more permanent (and fix the thermal blankets/external hull, because, if it was a micrometeorite that reached the pressurized part, there must be a hole there too).

The story was that the discovery was one of horror. Basically, it was a tragedy averted. Also, the tape was on the outside, but I forget the particulars.