Deep Impact 399 Open

August 1, 2012
Deep Impact’s 399 Open has stepped hull that creates a cushion of air for a smoother ride and greater fuel efficiency at speed. Courtesy Mercury Marine
Powered by three Mercury 300 Verado outboards, this 39-footer achieved a top speed of 66 mph in our test. Courtesy Mercury Marine
The 399 Open reached planing speed in 5.4 second and accelerated from zero to 30 mph in 12 seconds. Courtesy Mercury Marine
The hull of the Deep Impact 399 has 24 degrees of deadrise at the transom, and this resulted in a very smooth ride in our test. Courtesy Mercury Marine
Twin 15.5-inch multi-function displays are housed in a pair of alcoves at the helm. Jim Hendricks
The wheel of the Deep Impact 399 Open is in the center of the console, allowing room for a throttle-man on the starboard side and another crewmember to port. Jim Hendricks
Mercury Racing Zero Effort throttle controls for the 399’s triple 300 Verados are situated starboard of the center-mounted wheel. Courtesy Mercury Marine
Twin 55-gallon livewells are built into the transom bulkhead. Both have latching clear-acrylic lids. Jim Hendricks
The hardtop features skylights, as well as an electronics box to house items such as VHF radios and stereo controls. Jim Hendricks
A raised foredeck helps when throwing a castnet or fighting a fish around the bow, but this also reduces freeboard up front. Jim Hendricks
Twin bucket seat are built into the front of the console, but without any grab handles, seating here is dicey when running in choppy seas. Jim Hendricks
Deep Impact integrated a tackle center and rocket-launcher rod holders into the aft of the pod containing the helm seats. Note the generous number of grab handles for crewmembers when the boat is underway. Jim Hendricks
The 399’s triple Mercury 300 Verado outboards achieved 1.25 mpg at 3,500 rpm and 33.9 mph, resulting a maximum cruising range of 538 miles. Jim Hendricks
Coaming pads encircle the interior of the 399 Open to protect anglers thighs and knees. The gunwales are appointed with flush-mount rod holders from bow to stern. Jim Hendricks
All hatches feature compression latches and gas-assist struts. The underside of each hatch and the locker interiors are gelcoated. Jim Hendricks
In-sole lockers such as this forward fish box are guttered under the hatch and plumbed to drain overboard. Jim Hendricks

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