SUBSIM Radio Room Forums - View Single Post - Type VII periscopes

Sailor Steve · 05-25-19, 12:43 AM

First, it's the Attack Periscope that's harder to detect.

Observation periscope plate from captured U-570 (renamed HMS Graph):

Maximum diameter = 7.1 inches.
Maximum diameter of head = 4 inches.

1.5x = 38 degrees
6X = 9 degrees (US source)

1.54x = 36.38 degrees
6.1x = 8.46 degrees

Exit pupil = 7 mm

Attack periscope:

1.5x = 38 degrees
6x = 9 degrees

Exit pupil = 3.5 mm

Prism tilts from -15 to +20 degrees

Direct reading range scale

includes ray filters

Well-illuminated azimuth with vernier and bearing marker

http://www.uboatarchive.net/U-570/U-570ONIReport.htm
http://www.uboatarchive.net/U-570/U-...tishReport.htm

05-25-19, 12:43 AM	#4
Sailor Steve Eternal Patrol Join Date: Nov 2002 Location: High in the mountains of Utah Posts: 50,369 Downloads: 745 Uploads: 249	First, it's the Attack Periscope that's harder to detect. Observation periscope plate from captured U-570 (renamed HMS Graph): Maximum diameter = 7.1 inches. Maximum diameter of head = 4 inches. 1.5x = 38 degrees 6X = 9 degrees (US source) 1.54x = 36.38 degrees 6.1x = 8.46 degrees Exit pupil = 7 mm Attack periscope: 1.5x = 38 degrees 6x = 9 degrees Exit pupil = 3.5 mm Prism tilts from -15 to +20 degrees Direct reading range scale includes ray filters Well-illuminated azimuth with vernier and bearing marker http://www.uboatarchive.net/U-570/U-570ONIReport.htm http://www.uboatarchive.net/U-570/U-...tishReport.htm __________________ “Never do anything you can't take back.” —Rocky Russo