Did any wartime US boats have snorkels?

[Capt.LoneRanger]

Originally Posted by Hartmann

XXi don´t sink nothing but...

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The destination for that patrol was to be the Caribbean, where the boat would be tested under all conditions. On 1 May, U-2511 made first enemy contact. Three days later, on 4 May, Adalbert Schnee received the cease-fire order. A few hours later U-2511 made contact with the British cruiser HMS Norfolk among some other British warships. The boat approached to within 500 meters of the British warship without any sonar contact from the enemy destroyers. Schnee had here the opportunity to make an absolutely deadly attack against the cruiser, but left the scene without attacking and headed back to base. U-2511 reached Bergen on 5 May, 1945. There the commander spoke with officers of the HMS Norfolk a few days later, and they found it unbelievable that U-2511 was able to get so close without any sonar contact.

True except one little detail: This was the second encounter of an enemy taskforce. I know, you have to dig deeper than Wikipedia-Tales, but infact the first contact was in war-time against a sub-hunting-group and U-2511 was detected immedately and long before it was in firing range. It was hunted down by the battlegroup, but surprised by the submerged speed and range, they lost contact and didn't get a DC close enough to the boat to cause a harm.
After the war was over, he made a mock attack on the cruiser, but Schnee noted, this was no real test, as the enemy was no longer on alert.