Hull, Deck, Cabin and Cockpit Construction
Hull Skin: Hull planked with ¾” western red cedar tongue and groove strip planking, ¾” Douglas Fir strips in way of keel floors, sheathed with 9-ounce unidirectional carbon fiber. Carbon fiber is vacuum bagged 90 degrees to centerline and overlaps 6” on centerline.
Frames: Laminated of 1/8” Douglas Fir veneer, molded 2”, sided 1-1/2” at sheer. Molding and siding will vary, as required by plans.
Floor Timbers: 3 ½” laminated Alaskan yellow cedar floor timbers in way of keel bolts, and 1 ¾” floor timbers mounted to each bulkhead with 3/8” bronze bolts through the keelson.
Bulkheads:  Marine-grade 3/8” Miranti plywood. Bulkheads to have margin pieces of 1-1/4” x 1” Alaskan Yellow Cedar.
Keelson: Molded 2-1/4”, sided as necessary to run out to a feather edge.  Two layers of ¾” Alaskan Yellow Cedar, and one layer of 18mm Sapelle marine-grade plywood.
Inner and Outer Stem: Laminated ¼” Alaskan Yellow Cedar, sided 7”.  Inner stem molded 4”, outer stem molded 1-1/2”.
Transom: Laminated of three layers 4mm Okoume plywood.  Transom frame around perimeter, 1-1/2” thick, made of two layers of molded plywood offcuts from transom lamination. Frame to finish 1” thick x 2” wide on forward face.
Longitudinal Girders: 9mm Miranti marine grade plywood, extending from bulkhead C to bulkhead H.
Chainplate Reinforcement: Chainplates mounted on 1 ¾” Mahogany blocks mounted on the aft face of bulkhead
Keel Fin and Ballast: Ballast approximately 5,625 lb. lead, cast in high-aspect ratio fin and foil-shaped bulb.  Top of keel fin of Douglas fir sheathed in three layers of 12-ounce biaxial cloth in epoxy. All ballast bolts are 1” fully threaded 316 stainless steel, cast in place in lead with lower ends welded together in casting.
Sheer Clamp: Laminated of Alaskan Yellow Cedar, two layers 9/16 “, to finish 1 -1/8”sided and 3 ½ ” molded.
Deck Beams: Laminated  four layers 9/16” Alaskan Yellow Cedar, molded 2 ¼ ”.  Standard beams sided 1-1/8”, heavy beams sided 1 ¾”.  Spacing about 14”, as shown on plans.
Carlins: ¾” x 2 ½” Alaskan Yellow Cedar.  Aft portion of cockpit carlins laminated of four layers of 5mm Okoume plywood laminated to the camber of the deck.
Sub Deck: 5mm Okoume marine grade plywood, secured to beams with 3M 5200 and 1-1/4” #10 bronze wood screws.  Joints scarfed. 
Finish Deck: 3/8” quarter sawn teak, laid in narrow planks, sprung to follow sheer.  Seams paid with TDS silicone rubber caulking.  Wider margin planks and covering boards around perimeter, and king plank down centerline, all of quarter sawn teak.  Finish deck bonded to sub deck with epoxy. 
Deck Hatches: Flush hatches to foredeck locker and lazarette constructed of 3mm Okoume plywood bagged either side of ¾ “ Corecell foam with Alaskan Yellow Cedar perimeter blocking. Flush dogs to secure hatches against watertight rubber gasketing.  Gutters made using 1/8 “ G-10 square stock 1 ¼ “ wide screwed and glued to inboard edge of carlins, with ¾ “ OD G-10 spigots for drains. 
Traveler Structure: Traveler mounted on deck backed up with 3” x 3” FRP angel iron through bolted to deck beam.
Rudder Bearing Support: Plywood deck reinforcement, supplemented with solid wood wedge to allow a bottom-mounted flange bearing to be installed in a composite tube. Rudder bearing to be completely below deck to allow a flush cover plate to be fitted in the deck.
Cockpit: Sole of cored construction; 3mm Okoume plywood skins, 12mm Corecell A-500 SAN foam core, 5/16 ” teak finish surface.  Engine box opens for access to engine and is watertight when dogged down. Cockpit sides of Okoume plywood, 9mm in forward portion, laminated of three layers 3mm in aft portion, sheathed in 10 oz. fiberglass cloth. Seat surfaces of  9mm Miranti plywood with 5/16 ” Teak finish surface.  Outer coamings of laminated Miranti plywood, veneered outside with 1/8” Teak.
Companionway Slides: Solid Teak, secured from beneath with #14 bronze screws.
Companionway Top: Made from offcut when companionway hatch is cut from cabin top, veneered with 1/8” Teak. Edge banding and deck beams are solid Teak.
Cabin Trunk Sides: Laminated Teak (exterior) and mahogany (interior).
Cabin Trunk Front: 3 layers 4mm Okoume plywood laminated to 60” radius, sheathed with 1/8” Teak veneer outside
Cabin Trunk Back: 12mm Miranti plywood with 1/8” Teak veneer outside Mahogany veneer inside
Cabin Top: 3mm Miranti plywood skins with a ½” foam core. Perimeter blocking is ½” Alaskan Yellow Cedar and 3mm plywood laminated to crown where required.

Deck Hardware and Features
Polished stainless steel anchor roller
Self-bailing anchor locker
Polished stainless steel dock line chocks port and starboard at bow, max beam and stern quarters
Polished stainless steel docking cleats at bow (2ea.) and stern (1ea.)
Polished stainless steel thru deck fittings / fills for fuel, water and waste
Polished stainless steel chainplates and chainplate covers
Large aft storage lazarette
Polished stainless steel ensign staff socket
Polished stainless steel solar vent for aft lazarette
Fixed oval-shaped port lights in cabin sides (2ea. port and starboard)
Lewmar opening hatch with screen and blind in cabin top above head / forward cabin area.
Self-tacking jib sheet track on cabin top
Polished stainless steel handrails port and starboard on cabin top
Polished stainless steel lifeline stanchions with Vectran life lines and Wichard pad eye endings fore and aft

Layout and Accommodations
Befitting her role as a high-end, performance-orientated day sailor, IRIS’s interior accommodations can best be described as “simple elegance”, finished off in the Herreshoff style combining soft white painted bulkheads, overhead, and joinery fronts with varnished Mahogany trim and varnished Mahogany cabin sole under foot.

One enters the main saloon from the cockpit by way of the companionway from the cockpit and a single step down. There are settees port and starboard that extend aft under the cockpit seating with seat backs that can be raised and fixed out of the way to allow the settees to become full berths for the occasional nap or night on board. The main saloon is well lit with polished stainless steel reading lamps in all four corners and with natural light provided by fixed ports in the cabin sides and an overhead “moon roof” that allows for light to flood the cabin when the companionway hatch is otherwise closed. The ship’s electrical panel, gauges for fuel and water along with the base VHF radio are located to above and outboard of the port settee and opposite (to starboard) is a long storage shelf Forward of the port settee is a gally area with Vitrifridge under-counter / drawer-style refrigerator below Corian counter top with inset Enu 2-burner butane stove and dry storage locker above and outboard. Opposite to starboard is another storage locker below Corion counter-top with inset Corina sink basin supplied with hot and cold pressure water and dry storage locker above and outboard.
A bi-fold door separates the main saloon from the head / forward cabin area. This cabin is finished in the same Herreshoff style as the main saloon with soft white painted joinery accented by varnished Mahogany trim. There is a large hanging and shelf space storage locker immediately to starboard and opposite (to port) a varnished Mahogany bench seat that folds up and secures to reveal the ship’s head (toilet). Furthest forward are sleeping accommodations for two (2) persons in a double berth with drawer storage under berth and shelves above and outboard (both port and starboard) for storage of personal items. There is ample natural light from two fixed oval ports in the forward cabin sides with additional light and natural ventilation provided by an overhead opening hatch equipped with screen and privacy blind.
Sparrow is also equipped with an Espar diesel-fueled, hot-air cabin heater keeping below decks areas warm and dry when needed.

Spars and Rigging
Fractionally rigged sloop configuration
GMT Composites double-spreader, carbon fiber mast
Leisure-Furl aluminum, roller-furling boom
PBO standing rigging (shrouds and backstay)
Stainless steel rod standing rigging (headstay)
Modern yacht braid low/no stretch sheets and halyards
Mast step fabricated of 3/8” aluminum plate, incorporating turning blocks to lead Main halyard, self-tending jib sheet, and two reef lines aft along underside of deck to the cockpit.

Sail Trim and Sail Handling Equipment
Mast Winch: Harken #35, 2-speed, self-tailing winch (1ea.) located on mast for single masthead spinnaker halyard, Code Zero halyard and two fractional headsail halyards.
Antal rope clutches for control of spinnaker and headsail halyards
Sheet Winches: Harken Proforma, #46, 2-speed, self-tailing winches (2ea.) for genoa, jib & spinnaker sheeting located on cockpit coamings port and starboard
Halyard and Sail Control Winches: Harken #46, 2-speed, electric-powered, self-tailing winches (2ea.) for main sheet, self-tacking jib sheet, main halyard, roller-furling boom control line and roller-furling headstay control line located on winch islands in cockpit port and starboard. NOTE: New starboard winch and winch motor 2023
Antal rope clutches for control of main sheet, self-tacking jib sheet, main halyard, roller-furling boom control line and roller-furling headstay control line
Harken self-tacking jib track with jib sheet led aft to cockpit.
Harken jib tracks with adjustable cars.
Harken genoa tracks (inset into cockpit coamings) with adjustable cars.
Harken electric-powered main sheet traveler with control lines led to cockpit.
Harken main sheet blocks with double ended mainsheet led to cockpit winches.
Harken spinnaker sheet blocks port and starboard (2ea / side)
Sail Tec hydraulic pump for control of vang and backstay.
Sail Tec hydraulic rams for both vang and backstay.
Harken roller-furling headstay with furling line led aft under deck to cockpit.
Spinnaker tack line with under-deck lead to cockpit
Jib Cunningham with under-deck lead to cockpit
Custom jib sheet in-haulers
Custom Jib car adjusters
Custom spinnaker and Code Zero twing lines
Main outhaul with under deck lead to cockpit
Main sail Cunningham
Winch Handles (6ea)

Sails and Canvas
2022 - Code 75 Xi 06 (North Sails)
2020 - Lt/med 105% 3di Raw 780 jib (North Sails)
2018 - A2 AirX 600 spinnaker (North Sails)
2017 - 149% 3di Raw 780 Genoa (North Sails)
2017 - 90% RF self-tacking 3di Raw 780 jib (North Sails)
2016 - Full batten 3di Raw 780 Mainsail (North Sails
2016 - A3 AirX 700 spinnaker (North Sails)
2013 – Full batten Mainsail
Mainsail cover
Pedestal cover
Cockpit cover (Sturdy Designs, 2023)
Cockpit cushions (Sturdy Designs, 2023)
Interior cushions

De-Watering Equipment
Rule 900 GPH Electric / Automatic Bilge Pump
Whale Gusher Manual Bilge Pump

Electronics and Navigational Equipment
B&G Chart plotter
B&G Sailing instruments (3 displays at mast)
Icom M424 VHF radio (below decks)
Icom Command Mic (helm)
Simrad AP28 Auto-pilot
Ritchie Helm Compass

Auxiliary Propulsion and Fuel Systems
Engine beds: flat and level bearing area provided on keelson for seal of Saildrive unit.
Main Engine: 2013, Yanmar 3YM30C-SD20  with saildrive
Reduction gear: Integral with engine. 
Propeller: Flexofold 15” folding two-blade
Muffler: FRP water lift muffler: Centex #1500079
Exhaust Run: 2-1/2” rubber hose to exit through hull aft of cockpit at boot top.  Through-hull fitting of FRP tubing glued into hull with slight lip.
Seawater strainer: Groco ARG-755-P
Engine controls: Single lever Edson
Engine panel: Yanmar engine
Diesel Tanks:  14 gallon tank fabricated of 1/8” aluminum located at aft end of settee on port side of salon.
Diesel Fill: One, of 1-1/2” USCG approved fuel hose, type A1 or A2. 
Stainless fill plate at side deck, clearly labeled “Diesel.” Plate and tank grounded as required.
Fuel filter: Racor Spin-on filter #120R-RAC-01.
Hoses: USCG approved for diesel.
Vents: Tank vent inside cockpit coaming box.
Valves: Stainless steel, shut off at tank for supply line.
Gauges: Electronic sender included in tank. 
Gauge in electrical panel: VDO #91761

Steering Systems
Brooklin Boat Yard signature varnished Sippo steering wheel
Edson steering pedestal
Edson cable and quadrant steering gear
Carbon fiber and foam composite rudder and rudder shaft
Jeffa self-aligning rudder bearings
Simrad AP23 autopilot
Emergency tiller

Electrical Systems
12-Volt Dc ship’s electrical system
Separate battery banks for engine start and lighting systems
Engine Start: AGM series 24 (1ea.)
Lighting: AGM 4-D (2ea)
Custom electrical panel with master switches for battery banks and individual circuits for all ships electrical functions
Battery charging by engine alternator and 110-Volt charger

Plumbing and Sanitation Systems
Hot and cold pressure water system
14 Gallon freshwater capacity
Engine supplied hot water
Webasto hot water storage tank
Jabsco pressure water pump
Jabsco pressure accumulator tank
Cockpit shower with hot and cold pressure water
Sink basin with hot and cold pressure water in head / forward cabin area
Dometic electric head
Head plumbed for discharge either overboard or to holding tank
Deck fitting for shoreside holding tank pump out.
9 Gallon black water capacity / holding tank

Ground Tackle
Bow anchor roller
Delta 22 lb. anchor with appropriate chain and rode
Lewmar low-profile electric windlass with remote hand-held control and fixed control at helm

De-Watering Equipment
Rule 900 GPH Electric / Automatic Bilge Pump
Whale Gusher Manual Bilge Pump

Safety Equipment
PFD / Type II / 1ea
PFD / Type IV / 1ea
First Aid Kit
Fire Extinguishers
Emergency Tiller

Additional Equipment
Ensign with varnished teak flag staff
Fenders with fleece fender covers (4ea)
Dock lines (4ea)