Professional dive crews serving Smithtown and the surrounding waterways. Hull inspections, dock and seawall work, and item recovery — done in the water, no haul-out required.
Call NowGet a Quote →Smithtown is our home water. From the Nissequogue River to Stony Brook Harbor and the town basins at Kings Park Bluff and Long Beach, Final Dive Co. knows these waterways firsthand. If your boat or dock sits anywhere along the Nissequogue or the Smithtown shoreline, we're minutes away — with dive crews ready for hull work, piling inspections, and recovery.
Our Smithtown service area covers Stony Brook Harbor, Nissequogue River, and Long Island Sound — including Kings Park Bluff Basin, Long Beach Boat Basin, and Nissequogue River Boat Basin. Don't see your marina or dock? We travel the whole shoreline — call us and we'll come to you.
Avoided an expensive haul-out thanks to Final Dive Co. They inspected my 45ft yacht's hull, swim platform, and anchor system in one visit. Clean report and great advice. These guys go where others won't.
We have a private dock and finally found a team we had an excellent experience working with. They provided specialized underwater labor.
After last winter's ice damage I called Final Dive Co for a seawall and piling inspection. Same-day response, clear plan, saved me from bigger problems. A++++.
Every body of water on Long Island dives differently. Here is what our crews plan for when we work the Nissequogue River, Stony Brook Harbor, Smithtown Bay and the Sound shoreline.
The Nissequogue is a tidal river with a sand and gravel bed in the lower reaches and soft organic mud upstream toward the head of tide. Sand shoaling is persistent near the river mouth.
The Nissequogue runs a real tidal current, and the river mouth at Smithtown Bay moves water hard on both the ebb and the flood. Dive work in the river channel is scheduled around slack. The river also carries freshwater flow, so the water column stratifies.
Variable and generally limited in the river, one to four feet, with better conditions out in Smithtown Bay on a flood tide. Spring runoff drops river visibility considerably.
Lower than the enclosed harbors. The brackish, moving water of the Nissequogue is a less hospitable fouling environment than a still saltwater basin, though hard growth still develops on gear left in through the season.
Tidal river dock structures take loading from both current and ice. Spring inspection after ice-out regularly turns up shifted pilings and undermined bulkhead toe along the Nissequogue.
Yes. The Nissequogue is home water for us. We inspect docks, pilings, bulkheads and moorings along the river and at the river mouth, and we handle recovery work in the river channel.
It is a tidal river, not a harbor. Water moves through the channel with real force on both tide stages, and that current both limits safe dive windows and drives the scour patterns we find at dock and bulkhead foundations.
Yes, and river bulkheads deserve closer attention than harbor bulkheads. Moving water undermines the toe of a bulkhead faster than still water does, and that undermining happens entirely below the waterline where it is invisible from the property.
More reading: Seasonal Inspection Guide · Hull Fouling & Vessel Performance · Dock & Bulkhead Maintenance