Some hints on making a an accurate PT-109 from the Revell kit after Kennedy took command...
1. PT-109 either had the mast in the lowered position or it didn't exist at all. When Kennedy got it the boat was well used. Photos of the 109 clearly show no mast. Speaking with the skipper of PT-105 this is what he thought.
2. PT-109 had roll off depth charges forward of the front pair of torpedo tubes. Kennedy had a torpedo accident with the port (left) forward torpedo. It accidentaly launched and blew the port depth charger right threw the deck. The deck was repaired but never replaced leaving only the depth charger on the starboard side of the boat. It would be accurate to build it either way. You will need to either buy them after market or scratch build them. You can find photos of them at some of the links provided earlier.
3. The boat should be painted a dark green. The original color was created mixing black and yellow paint. There are not accurate records of what the color really looked like.
4. The kit decals are not good. But DO NOT use the large letters that they show going on the bow. The 109 didn't have that. The only numbers are on the starboard turret, the gun mount on the stern and the front of the chart house.
5. Don't put up the rope stanchions on the fore deck. These were considered dangerous for the crews in combat and were stowed and never used.
6. Don't worry about the anti-tank gun that was lashed on the deck just prior to the boat being sunk. There's really nothing available in this scale and it wasn't there long enough to worry about.
These are the basic fixes for a beginer. There are more that can be done if you are a more advanced modeler. For example White Ensign Models makes a nice photo etch set for the boat. There are a lot of other minor modifications that can be done to make it more accurate that you can pick up on by looking at photos at the sites mentioned above.
Now, if you want to build the boat prior to Kennedy as it appeared coming out of the factory, do everything I mentioned above except put up the mast, paint the boat a two toned gray (top surfaces like the deck being darker) put up the rope stanchions and forget the depth charges.
Another hint. Do a Google search for PT-109 and select images. You'll see a lot of real bad interpretations there, but you will find some photos of the real boat.
If you have any questions feel free to contact me directly. I can give your more detail that you will ever care to know.
davidwaples@comcast.net