Silver Tern Specifications

Silver Tern 2013 Mumby 48 This catamaran was professional built to the highest standards so it could be sailed safely anywhere in comfort at high speeds. This is number 40 of these ocean going boats. She is a three cabin version with a workshop, laundry room and huge dry locker on deck. Silver Tern was built specially for the owners who wanted a very strong, easy to sail and comfortable to live on voyaging boat. She has extra structural supports running along the hulls. There are fore and aft crash bulkheads. Her salon and cockpit accommodate the owners 1.85 M height and the inboard areas of the aft bunks are 50 mm higher than normal. She was built with custom hand rails allowing safe access to the transoms without the danger of going overboard. These handrails also make it much easier to get in and out of the dinghy. She was custom built with integral in-hull fuel tanks. These allow the weight of the fuel to be lower and outboard. There is a custom double helm seat with storage under. All normal sail handling is done from the cockpit. The galley was redesigned to accommodate larger refrigeration areas, a spice rack, an integral rubbish bin and easy access to cooking tools. The chart table is extra-large and the electrical panels are very comprehensive. The salon settee has corners instead of a circular shape. This does not look as good, but is much more comfortable for lounging, sleeping or watching the built-in 12 V. TV. The interior is beautifully fitted out in seamless molded fiberglass, it is easy to clean and is maintenance free. The floors are hand-built rosewood and beech wood, the cupboard doors are hand crafted from red cedar and Philippine rattan. It has kick up rudders with shaft driven folding propellers that allow it to float in only 0.6 meters of water. All deck gear is over sized to safely handle the loads and speeds of long ocean voyages. She is rigged to be easily single handed. There is sufficient solar to allow the boat to sit at anchor or sail for extended periods of time without running the engines. Lights, refrigeration and the water maker are all 12 V and solar powers them all. We have never used shore power when in a marina or on the hard.

Vessel Name	Silver Tern
Year	Hull first registered 2011, boat completed 2013
Length	47' 5" - 14.46m

Beam	7.4 meters
Draft	0.5 meter rudders up 0.7 meter rudders down
Displacement	8 tons at cruising weight
Keel / Ballast	Dagger boards

	Designer	Tim Mumby
	Builder	Harwood (Hulls) and Tim Mumby
	Hull Material	Aluminium
	Decks Material	Aluminium
	Engine	Two Yanmar YM30hp engines with shaft drives, dripless shaft seals and two blade folding propellers
	Engine Hours	453 hours port engine.456 hours starboard engine
	Engine Room	Spotless with excellent access, Sound proofed, Racor fuel filters and valves to choose fuel tank (either or both engines can use center tank under cockpit).
	Fuel	Three tanks, one in each hull (250L) and one center tank under cockpit floor (200L). Total of 700 liters. <3L per hour at 2700 rpm, one engine. 6.5+ knots in calm water
	Water	Two tanks 280 liters each.
	Dinghy	AB10 AL lightweight with aluminum floor and anchor locker
	Outboard	Yamaha 15 hp 2 stroke, Yamaha (decals removed to make it less inviting to thieves). 3 hp spare Yamaha engine
	Covers	3 Cockpit covers, winch covers, helm, covers, forward and main cabin awnings, window shade covers, hatch covers. Eisenglass rain and windscreen Vinyl/Eisenglass cover for stbd. cockpit window to allow access to chartplotter from helm during rainstorms Large lightweight sunshade for foredeck lounging.
	Heads.	Two electric toilets with holding tank. Two showers plumbed, only port shower in use. Hot water heater installed but not plumbed, no need for hot water in SE Asia
	Accomodations	: 3 king, queen double beds and one single. Executive cabin with two fans, two reading lights and bookshelves. Eleven Hella two-speed ventilation fans. Laundry room with Lemair washing machine, laundry sink and extra fridge/freezer. Lots of storage with pad eyes to secure stowed items.
	Galley	Four Burner cook top with oven and grill. Twin sinks with drain tray, pressure water. Salt and freshwater foot pumps. Plenty of counter space and storage. Built-in spice rack and utensil holders. Built-in rubbish bin under cover on counter top next to sink. Extra storage for heavy items. Barbecue is stored under helm seat and attaches to propane tank in cockpit locker.
	Refrigeration	All 12 V Novacool air cooled refrigeration. Larger side by side fridge and freezer in galley; fridge 181L and freezer 59L. Extra 68 liter fridge or freezer in laundry area.
	Ground Tackle	80 meter short link 3/8 chain Manson 60lb supreme anchor, Spare anchor is Manson Racer lightweight. Heavy duty Electric anchor winch Hutton Orca VE1200. Large anchor and wet lockers. Spare chain and nylon rode, extra lines, etc. Anchor and mooring bridles.
	Safety Gear	Life jackets, , 4 fire extinguishers, Bosun's Chair, Life sling recovery system, MOB pole, air horn, anchor strobe
	Electrics	JYINS 3000 W pure sine wave 220 V inverter wired to outlets throughout boat, plus Cobra 400 W 110 V inverter mounted above chart table for laptops etc. Water maker Spectra Ventura 150, makes 30-35 Liters per hour, automatic flush system.  Led deck lights. Four each 230 W solar panels, Morning Star 65 amp solar regulator with monitor at chart table. Five 130 AH AGM batteries. All LED lighting. Wiring connections; Anchor Marine crimps.
	Electronics Navigation	Raymarine C 90 W chartplotter, integrated Sitex class B AIS transceiver and integrated 48 mi. radar. Raymarine X5 autopilot, ICOM IC-M710 SSB/Ham radio with tuner and antenna on shroud. Pactor 3 Modem. Standard Horizon Matrix AIS VHF. Standard Horizon handheld VHF mounted by chart table. Blue Sea battery and tank monitor. High gain external Wi Fi antenna with router.
	Sail Inventory	UK Halsey radial cut spectra fully-battened main sail with 3 reefing points. UK Halsey radial cut spectra furling headsail with UV cover UK Halsey spinnaker 1.5 oz 148sq. m with sock. UK Halsey stay sail with slab reef to storm sail. Lazy jacks with boombag / cover
	Mast / Rigging	18.5 meter allyachtspars 7/8 anodised mast with removable batten car track. Ronstan top of the line fast release 7 roller bearing cars. Spin lock jammers.. Twin car head board with 2.1 spectra halyard. 6 meter anodized boom. Single line in-boom reefing system for first two reefs. Pro-furl furler on genoa, hanked-on staysail. All spinnaker gear and lines
	Deck Gear	3 car roller bearing main traveler on 5 meter curved track. Spinnaker prodder and blocks, Winches Hutton Orca 2PC 66 st 2 speed. 2 PC 52 st 2 speed. 3 PC Hutton Orca 46 st 2 speed. All gear oversize. Spectra Halyards, spin lock jammers Hutton 2 speed electric winch at helm allows for mainsail to be raised and reefed from helm station, no need to go forward; fast, easy and safe. Main halyard reefs 1 and 2 and topping lift led to jammers in front of electric winch. Dual helm chair with storage under for cockpit gear, fishing tackle and BBQ. Entertainment: 12 V TV with USB and HDMI inputs. HDMI cable to chart table. Will play video from DVD player, external hard drive or computer.  Sony DVD, CD, USB and mini jack inputs for movies and music.

Boat is complete with new custom-built Jordan series drogue, SCUBA compressor and tanks, tools, galleyware and bedding. Owners are leaving SE Asia.

See more photos below

 Aft Cabin looking aft

 Nav. Station and helm chair

 Safety rail on stern

 Navigation table and electrical panels

 Midship (executive cabin)

 Galley with oversized refrigeration, spice rack and storage cubbies.

 Galley looking aft into aft cabin
 

 Outoard side of galley with SMEV stove/oven

 Double helm seat with storage under, electric winch above to right

 Laundry room storage with small fridge/freezer, water heater above

 Lemair washing machine in laundry

 Looking aft from laundry past workshop into aft cabin

 Laundry looking forward into head. Filters are for Spectra Watermaker

 Built in rubbish bin next to drainboard in galley

 Salon with comfortable seating and beautiful table

 Mumby 48 (sistership) under sail

 Normal late morning solar.

 Watermaker

 At anchor

 12 V TV

 workshop with storage and single bunk

 Engine panels