I don't believe we gave away MK 16's to our client nations. Reason being the Mod 6 which was the first big production run, was full of problems caused by Navol (H2O2O) contamination and leakage in the torpedo energy section and an overly complicated exercise head. I know in 1961 loading warshots for a Western Pacific deployment on board USS Cusk SS-348, our skipper elected to take Mk 14 Mod 3's rather than MK 16's because of all the problems with them. We still had submarine "operators" at that time who had experienced all the teething problems with the MK 14 during WWII, and they saw a lot of the same kind of stuff going on with the MK 16 Mod 6.

All the Mk 16 Mod 6's were recalled to torpedo stations for a major rework in the mid 1960's. They were reissued as MK 16 Mod 8's. The major change was the replacement of air actuated valves in the Navol distribution system with explosive actuacted valves and a simplified exercise head which was a copy of a MK 14 exercise head. That fixed all the problems with the MK 16.

I shot over 60 Mk 16 Mod 8 exercise units during my five years on USS Barbel SS-580 from 1970 to 1975. They were all HSN. In late 1973 we shot the first Mk 16 Mod 8 warshot in 8 years. It was HSN, ran 88 seconds, hit the target Island of Kahoolawe, and when 740 lbs of HBX-3 detonates it gets your attention. (By the way, I have never heard them get the sound of a torpedo detonation right in a movie.)

My understanding at that time was all the MK 16 Mod 8's were concentrated in Pearl Harbor. I was told recently by a shipmate and former Barbel "gun boss" who was XO on Barbel in late 70's, when the MK 16 Mod 8 was recalled to be taken out of service, Barbel expended her warshots against Kahoolawe the target island.