Duet is a Nordhavn 50,  and was commissioned in 2000.  She is hull #15 of 26 hulls built between 1997 and 2005.  The Nordhavn 50 was discontinued when the Nordhavn 47 was introduced, but is known as one of the most efficient hulls that Nordhavn has produced.  
 
She normally cruises at 8 knots, burning approximately 4 gallons of diesel per hour, which gives her a range of about 2,000  nautical miles, with a 15% reserve and daily generator usage.  If she slows down to 6-7 knots her range increases to 3,000 nautical miles.  She carries about 1,400 gallons of diesel fuel in 4 fiberglass tanks. 
 
Duet weighs approximately 90,000 pounds with a full load of fuel, water and stores.  She is about 51 feet long and 16 feet wide.  She draws about 5 feet 8 inches, but we always assume that we need at least 6 feet under the keel.
 
She is a widebody design, which means she only has an outside walkway down her starboard (right) side, as you can see in the above picture.  That makes her living spaces that much larger.  Handling her without a port (left) walkway is similar to handling the Nordhavn 46, so we have had no difficulty.  
 
Duet has two staterooms (bedrooms), two heads (bathrooms), a large galley (kitchen) and a big salon (living room).  Her pilothouse includes a Stidd helm chair and a comfortable bench seat for the off watch.  She has a semi standup engine room, which means that Captain Ron can stand (almost) around the engine, but has to bend over to access other systems in the back of the engine room.  She has a huge lazarette under her cockpit, which is rather like a basement.  Captain Ron has already taken it over completely and is filling it with various important items. 
 
Duet has something our 46 didn't have, a large flybridge with an area for seating and dining.  While we don't envision running the boat frequently from the flybridge, we do see many nice outdoor cocktail hours in our future.  
 
She also has a cockpit steering station, which means that Captain Ron can actually see where he is going when he is backing up, which was not true on the 46.  We can tell people that now, we didn't tell them them when we had the 46, it tended to make them nervous.
 
Duel has many creature comforts, extensive mechanical and electrical systems and lots of safety gear.  We have listed most, but probably not all, of it below.
 
Domestic Systems
 
2 SubZero refrigerators
SubZero freezer with icemaker
Chest freezer in the pilothouse
Microwave/convection oven
Propane cooktop and oven
Propane BBQ grill on aft deck
Miele dishwasher
Broan trash compactor
Asko washer and dryer
1200 gallon per day Sea Recovery watermaker
300 gallons of water in 4 tanks
Large hot water heater
5 reverse cycle A/C units
5 zone Webasto diesel heater
LED lighting throughout
Bose sound system in salon
Sharp TV with KVH G4 satellite antenna
Speaker system in pilothouse and on flybridge
2 Tecma freshwater flush heads
 
Electronics
 
12KW 7112 48 mile Furuno radar with 6 foot open array and ARPA tracking
4KW 1832 36 mile Furuno radar with dome antenna
2 Robertson AP 20 autopilots
1 Robertson autopilot AP 22 control head in pilothouse
2 Robertson autopilot AP 20 control heads; flybridge and cockpit
2 Northstar 951X GPS units
Dell desktop computer running Coastal Explorer and interfaced to all navigation systems
15 inch color screen
Dell laptop running Coastal Explorer with wifi interface to all navigation systems
Ipad running iNax with wifi interface to all navigation systems
2 Icom VHF radios; pilothouse and flybridge
Handheld waterproof VHF for dinghy
Icom SSB
Furuno weatherfax
3 B&G Hydra depth, wind and speed instruments; pilothouse, flybridge and master stateroom
Furuno loud hailer
2 Furuno color depth finders; pilothouse and cockpit
Digital Yacht AIS Class B send/recieve
Datum electronic control for the Naiad stabilizers
Bow thruster controls at 3 stations; pilothouse, flybridge and cockpit
Elbex CCTV system with three cameras; engine room, aft cockpit and flybridge arch looking aft
Wilson cell phone amplifier
Buell  air horn (very loud)
 
Mechanical and Electrical Systems
 
Lugger 6108A2 continous duty main engine with 300HP
Northern Lights 12KW generator
Yanmar wing engine
ZF transmission
Naiad Model 252 stabilizers with 7.5 foot fins
10HP 24V ABT bow thruster
Mathers Micro Commander electric engine controls at 3 stations; pilothouse, flybridge and cockpit
1500 amp hours of Lifeline AGM house batteries
2 Victron 3KW 12V inverter/chargers
2 Victron 100 amp chargers
Reverso oil change system for main, generator and wing
 
Deck and Safety Gear
 
1000 lb Steelhead 24V electric/hyraulic davit
Apex 11 foot dinghy with 40HP Yamaha engine, center console and depth finder
Switlek liferaft in hard case
Maxwell 3500 24V windlass
400 feet of 3/8 inch Grade 40 chain
154 lb Rocna 70 anchor
2 immersion suits
EPIRB with hydrostatic release
2 personal GPS PLB units
2 Mustang Automatic Inflatable PFDs with harnesses
2 Mustange Automatic Inflatable PFDs
4 Adult and 1 child life jacket
Extensive flares and smoke cannisters
2 SOS signaling lights
2 handheld spot lights
2 automatic fire extinguishing systems; engine room and lazarette
6 hand held extinguishers distributed throughout the boat
Wireless smoke and CO detectors