An anti-sonar mat
Oppanol was good news
Type XVIIC the first to use
U-480 did cruise
Shot down a Canso* en route,
Sank and damaged 4 boats**,
For seven hours the RN led the hunt
U-boat eluded due to rubber coat

Killed sound, adhesive stick.
4 mm thick
Types XXI and XXIII would get it
Fooled sonar, less deep divin‘, more darin’
Germans called it “Alberich skin***

No need to flee the scene
When the U-boats came close
They couldn’t be seen
U-boat Captains did toast
Merchants to defeat
Schnorkel tarnmatte coat****
But yet it came too late…

Oppanol rubber coat

Killed sound, adhesive stick.
4 mm thick
Types XXI and XXIII would get it
Fooled sonar, less deep divin‘, more scarin’
Germans called it “Alberich skin”

In ‘45 was a test
Type XXIII to go
‘Twas U-4709,
Reductions showed
Rest sat in the shipyards
The work progress went slow,
Day and night bombs raining down
To strike the new tech boats

Oppanol rubber coat

Killed sound, adhesive stick.
4 mm thick
Types XXI and XXIII would get it
Fooled sonar, less deep divin‘, more scarin’
Germans called it “Alberich skin”

[Looking for a new sea-war win]