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![Valuable feedback](https://air-onlyventilators.com/wp-content/uploads/2013/07/1000520_532384523495912_683164513_n-470x140.jpg)
John Larsen from US wrote to Hallber-Rassy asking how well Air-Only ventilators work before he start drilling large diameter holes in his deck. Read below…
![Air-Only Low Profile ventilators on Hallberg-Rassy 55](https://air-onlyventilators.com/wp-content/uploads/2013/01/hr55-02-470x140.jpg)
The Hallberg-Rassy 55 premiered at the world’s largest boatshow, boot Düsseldorf in Germany 19-27 January 2013. There are some pictures of Hallberg-Rassy 55 on winter…
![Safehaven Marine undertake live (manned) self-righting roll over test](https://air-onlyventilators.com/wp-content/uploads/2013/12/test1-470x140.jpg)
Safehaven Marine, specialist builders of pilot boats and rescue vessels have undertaken probably an industry first, by capsizing their latest Interceptor 48 Pilot / S.A.R….