U-155: Snorkel head in its housing on the starboard side of the foredeck

U-155: Snorkel head in its housing on the starboard side of the foredeck. The ball float is in place along with the air warning radar dipole on the top

U-155: Snorkel head in its housing on the starboard side of the foredeck. The ball float is in place along with the air warning radar dipole on the top (Innes McCartney)