Allen J. Dannewitz Professional Marine Services LLC

Marine Surveys, Insurance surveys, Appraisals, Insurance Claims.
Allen J. Dannewitz has been in the marine service business on Long Island for over 30 years.  Let him help you make your boating experience the best it can be!


My marine and mechanical experience extends back to my childhood. My career started while working for Robert E Derector, an admired yacht builder. While working there, I had the pleasure of working with some of the finest craftsman in the world, on yachts, power and sail, from eighteen to eighty feet. I moved on to manage my marina in Eastern Long Island.

Let me: Allen J Dannewitz help you buy the boat of your dreams, with a Marine Condition and Value Survey.  My field inspection includes, hull and deck inspection, engine testing, systens testing and a sea trial. A next day findings list will follow. My Survey Report includes, a detailed discription of the vessel, full inventory of equipment, location of thru hulls and bilge pumps, sea trial report, vessel valuation, hull identification, detailed list of findings and recommendations with digital photos. Most Survey reports run 18-25 pages long.

I moved out to Long Island in 1977 where I owned a full service upscale marina with my brother for over 27 years. Not ready to retire, I attended the Chapman's School in Stuart Florida for instruction in Marine Surveying and Damage Claims work. I became a member with SAMS, (Society of Accredited Marine Surveyors) and ABYC, (American Boat and Yacht Council).  I have been surveying Yachts and Small Craft both power and sail mostly on LONG ISLAND and in the northeast region of the United States. I also do damage and claims work for insurance companies and I am an active member with SAMS, ABYC, BOAT-US and AMI.  I attend many conferences each year and keep up with the latest tools and techniques the industry has to offer.

Please contact me HERE if you need consultation while buying, selling or problem solving with a Power Boat, Sail Boat, Performance Sport boat, Motor Yacht or Sailing Yacht.
Please visit the
SAMS web site, an organization I am proud to be a member of.
Menber: SAMS (Society of Accredited Marine Surveyors) ABYC (American Boat and Yacht Council) AMI (Association of Marine Industries) Boat U.S.