Love Narwhal, with them 6 inch deck guns she's more like a submersible light cruiser than a sub.
Articles like this;
http://en.wikipedia.org/wiki/USS_Narwhal_%28SS-167%29
Really irritate me, you can tell it was written by a civilian who has zero understanding of the military.
"Narwhal joined Plunger and Trigger in scouting east of Midway; during the Battle of Midway on 3–6 June, these submarines – along with 15 others – accomplished nothing."
Idiot studying to be a moron but not studying very hard.
ALL scouting missions accomplish something very important when they find nothing, that tells the admirals or generals where the enemy is NOT, which helps tremendously not only in figuring out where the enemy IS by process of elimination, but also for planning movements, flanking maneuvers, and counterattacks. Midway island set out dozens of PBY search planes, 4 actually found the enemy, the rest told Nimitz which sectors the enemy was not approaching from. The subs did the same thing.