Since the dawn of humanity, man has longed to conquer the ocean, which is why the invention of the boat was followed swiftly by the adoption of the high-five. Take care of man's triumphs with today's Groupon: for $145, you get a Dry Dock maintenance package for boats up to 21 feet in size at Lakeside Auto and Marine Detailing (up to a $290 value). Owners of boats up to 30 feet in length can qualify for this deal by paying an additional $13.80 for every foot over 21 feet.

The professionally trained and insured technicians at Lakeside Auto and Marine Detailing scrub boat interiors with dirt-purging shampoos and polish exteriors with glossy waxes. In the Dry Dock maintenance package, which could take several hours depending on the size, condition, and squirminess of the boat, detailers run through the interior with a vacuum to sniff out scattered debris and follow with a sanitizing wipe down. Next, hand-operated towels clarify windows, spot-defying shampoos lather into carpeting, and vinyl cleaning and protection treatments coat surfaces. On the exterior, technicians dispel dirt, grime, and orca graffiti with soapy water during a hand wash before administering a chamois dry. The detail concludes with healthy applications of hand wax to armour the crystalline finish and protect the shiny shell from weather damage.