Came across from the 'Defense Industry Daily' email;

"The MESMA anaerobic system  will change the Scorpene’s ability to operate underwater for sustained periods without having to surface. An AM-2000 is still not in the same league as SSN nuclear subs which can do this indefinitely, but it is a substantial improvement that reduces “indiscretion time” on the surface where the sub can be spotted by radar, and also heard more easily by underwater sensors. A CM-2000 Scorpene can operate underwater for 4-6 days without surfacing or snorkelling to get oxygen to recharge its batteries. An AM-2000 Scorpene, in contrast, will be able to operate for up to 18 days, depending on variables like speed, etc."

It went on to say that this system is actually LESS efficient than some others & there was also a claim by Chile that it's latest diesel/electric subs would be able to operate underwater for a max of 50 days.

interesting...

-----------------------------------------

"It has refinements, technological advances, & a much more sophisticated approach to the destruction of human freedom.
But like every one of the super-states that preceded it, it has one iron rule;
Logic is an enemy & truth is a menace."
Rod Serling, excerpt from prologue, Twilight Zone.