the Metis Line, a Kondo Syokai initiative

the yachts | sponsorship | PO examples | PO review panel | rates | FAQ | contact

the Blue Michi Gazelle

Specification

9th July 2009

 

About

The aims of this specification are to detail a sailing vessel that:

1. ensures minimal initial and operating costs without compromise on function and durability.
2. facilitates group sailing activities - up to 6 unrelated people sailing and working together for prolonged periods
3. is robust and able to withstand heavy crew use
4. can be easily maintained and serviced in locations where facilities are poor
5. provides an excellent sailing experience

The specification is based on design 103 Gazelle, a junk rigged ocean schooner by the American Naval Architect, Thomas E Colvin.

 

PART 1 - Overview

 

Main features

 

sail plan

The standard sail plan is the Colvin junk rig. Nearly all Gazelles built todate are fitted with this rig. It is an option to fit a gaff rig but in this case the masts are not fitted in tabernacles which can be important depending on where the boats are to be operated and stored when not in use.

 

auxiliary

A key means of achieving the aims of the specification has been to do away with an internal auxiliary and use an external system of twin OBM's fitted in custom mounts amidships, port and starboard. When raised the OBM's are secured in between the shrouds. This is an important matter and is discussed fully here.

 

raised aft cabin

This is really an essential design option of the original gazelle plans. Without this the aft cabin is pretty dull and with little head room. With it the aft cabin is transformed. By extending the raised portion no further aft than the original hatch no deck space is lost, and by keeping the profile low no additional significant windage is likely.

 

roof ventilation

Portlights are no longer used to provide ventilation in the main cabin - their only purpose is to provide light. Ventilation is provided by a split roof system which has the following advantages over opening portlights:

• it provides more surface area to the wind - twice as much as all the portlights combined
• it channels the wind into the cabin
• when open it is protected against water ingress from rain and deck wash

The split roof ventilation can be very securely closed to prevent water ingress.

 

tabernacled Masts

(not for the gaff rig)

Enables the vessel to gain access to locations when overhead obstructions are present and makes for easy repair.

 

interior layouts

Group Sailing

The main cabin provides a spacious galley, navigation station, 6 bunks, baggage storage, toilet and shower. There is no seating area - this is provided in the aft cabin. This is different to many yachts where the main cabin is the living area. In this specification the main cabin is purely functional - cooking, sleeping, navigation, storage.

Capt Bani Das

The aim is to provide for 2 persons sailing with crew or occassional friends

The main cabin provides an entrance for managing wet gear and drying off, a spacious galley, a large bench seat and table, 2 crew/guest bunks, toilet and shower in the peak. The aft cabin is the Captains quarters and provides bunks, table, hanging lockers.

 

PART II - Detailed Specification

 

Introduction

This document is the specification for a sailing vessel (the Blue Michi Gazelle). The name of this document is Blue Michi Gazelle (BMG) Specification. The Blue Michi Gazelle is a steel hulled 42 ft. junk-rigged schooner based on the design 103 Gazelle by the American Naval Architect, Thomas E Colvin.

 

Terms and definitions

KSM means Kondo Syokai Marine

P/S means port and starboard

manuf means manufacturer

MS means mild steel

GS means galvanised steel

SS means stainless steel - 304 unless otherwise specified

 

The specifications

The BMG Specification derives in part from drawings, in part from International Standards and in part from the written details contained herein.

 

International Standards

The vessel shall comply with the following International Standards

• BS EN ISO 10133:2001 Small craft - Electrical systems - Extra-low-voltage d.c. installations
• BS EN ISO 10239:2000 Small craft - Liquid petroleum gas (LPG) systems
• BS EN ISO 9094-1:2003 Small craft - Fire protection - Part 1: Craft with a hull length of up to and including 15m

These standards are hereby incorporated into the BMG Specification.

In the event that there exists a conflict between the aforementioned International Standards and the specifications hereinafter detailed then the International Standards shall prevail.

 

The Drawings

The drawings used (the Drawings) and the specifications derived from each (Specifications As Drawn) are listed below.

  Drawing                   Specification As Drawn

  Colvin 103-1-J            sail plan
  Colvin 103-2-J            lines and offsets
  Colvin 103-4-J            scantlings
  KSM BMG-INT-ARRGT         as drawn
  KSM-SPLIT-ROOF            as drawn

The Specifications As Drawn are hereby incorporated into the BMG Specification except where the words as drawn are used in which case the respective drawing is incorporated in toto into the BMG Specification. For the avoidance of any doubt, the Drawings are not part of the BMG Specification except where the specification is as drawn.

In the event that there exists a conflict between Specifications As Drawn, the specification lower down the list shall prevail over any specification higher in the list

 

Written specifications

The remainder of the BMG Specification is detailed hereinafter (Written Specifications)

In the event that a conflict exists between the Specifications As Drawn and the Written Specifications the Written Specifications shall prevail.

 

Materials

All steel used shall be mild carbon steel unless otherwise specified herein.

All wood used shall be marine grade ply or solid wood.

The cabin roof sides and handrails shall be of teak

The wooden cleats shall be of teak

 

Hull

The hull shall be of steel - minimum 10 gauge

 

Steel sections

Where any steel section noted in Specifications As Drawn is not readily available it shall be exchanged for another section after taking written advice from a qualified Naval Architect

 

Ballast

The ballast shall be of lead bricks secured in place with steel rods except as detailed hereinafter.

A concrete ballast shall be permitted in the chain locker and the next frame aft

 

Insulation

Insulation shall be fibreglass bats fitted above the waterline (for the tropics)

 

Coatings

Coatings shall be 2 pack epoxy paints from Shalimar except where otherwise noted. Paint shall be applied by air spray except where noted below.

The following schedule shall be used, in which 1 coat is 4 full passes of the gun and 1 pass of thinned paint:

  Sr.No  Product Name            Coats

Above Water       
   1     zinc phosphate primer    2
   2     top coat                 2
   3     (optional)
         international brand
         top coat                 1

Boot Stripe
         international brand
         e.g. Jotun               2 

Under Water                    
   1     zinc phosphate primer    2
   2     high build coal tar      2
         (applied by brush)

Interior
   1     zinc phosphate primer    2
   2     grey top coat            2

 

Decoration

• the deck shall be white
• the hull above the waterline shall be white
• the boot stripe shall be red
• vessel name and Port of Hail shall be painted on the bows and transom
• the Blue Michi decal

 

Antifouling

2 coats of Shalimar Shalispeed antifouling shall be applied below the waterline and on the splash area under the aft cabin

 

Tankage

• water: 60 US gallons fibreglass tanks

 

Deck

• the stanchions and guard rail shall be painted MS
• netting fitted to rails around aft deck
• 2 nos deck boxes P/S shall be fixed at forward end of cabin roof

 

Masts and Spars

• masts shall be seam welded carbon steel fitted in tabernacles

 

Sails

• material shall be 10.2 oz army duck canvas
• rings for tack, clew, head and nock shall be brass, hand stitched and fitted with brass liners
• battens shall be of laminated cedar or optionally bamboo

 

Rigging

• shrouds shall be secured using deadeyes
• all sheets shall be led back to steering position and cleated off
• cleats shall be fitted at masts for securing halyards and snotters
• pin rails shall be fitted at masts for hanging halyards, snotters, jib sheets (main mast)
• sheer pole shall be fitted atop the shroud deadeyes for fore sheets, lazyjacks and main sheets

 

Vessel systems

 

Auxiliary

Custom OBM mounts allow fitting of 2 OBM's to the vessel

 

Steering

• worm gear, KSM manuf.
• ships wheel with SS trim, KSM manuf.

 

Anchoring and mooring

• combination windlass/bitts/navel vent trunk, KSM adapted Colvin
• chain locker - drainage to main bilge tank
• post mounted gypsy with twin drums, KSM manuf
• catheads P/S
• aft. qtr. bitts P/S
• bow chocks P/S (SS)
• 2 nos. Colvin Standard 35# kedge anchors
• rodes:
• 50 fathoms 5/8 nylon + 5 fathoms 5/16 GS chain + swivel
• 28 fathoms 5/8 nylon + 5 fathoms 5/16 GS chain + swivel
• 6 nos. mooring lines, 7 fathoms ea. 30" eye splice one end, seizing on other end
• rubber deck protection - covering in bow area forward of the windlass
• anchor rest on railcap
• 8 nos. small tyre fenders with canvas socks + 2 barge boards

 

Bilge

• 1 nos. manual pump operable from main cabin
• 1 nos. manual pump operable from the helm
• 3 nos. bilge alarms

 

Electrics

• 12v system intended for use with small solar panel (not supplied)
• LED navigation and interior lights
• switch panel with fuses
• isolating switch
• ammeter and voltmeter on switch panel
• cigarette lighter socket
• battery hookup for attaching spare battery and charging
• connection for towed charger/windcharger

The electric system shall comply with BS EN ISO 10133:2001 Small craft - Electrical systems - Extra-low-voltage d.c. installations

 

Sweet Water

• Filler pipe through anchor bitts
• 12v electric pump from storage tanks to header tank fitted to main cabin roof just aft of foremast
• fittings to allow connection of manual pump (not supplied)

 

LPG

Provision is made for the storage of 2 nos. LPG cylinders (not supplied) on the main cabin roof.

Galley stove is fed from mini LPG cylinder which is refilled from the main tanks. Decanting system supplied but excluding regulator to attach to main tanks.

The LPG system shall comply with BS EN ISO 10239:2000 Small craft - Liquid petroleum gas (LPG) systems

 

Fixtures and fittings

• lockers are provided with finger openings

 

Windows, lights and ventilation

• port lights - 7" non openers:
• aft cabin: 3 nos. P/S
• main cabin: 5 nos. P/S
• ventilation:
• main cabin - split roof system
• aft cabin - via access hatch and by piping from main cabin

 

Equipment

 

Navigation

The compass is mounted on the cabin roof and is specially selected for proper operation on a steel hulled vessel

• compass, international brand (e.g. plastimo) supplied with deviation table
• ships clock
• ships barometer
• lights - LED
• running
• anchor light fitted top mainmast
• steaming light fitted top foremast
• sound equipment
• ships whistle
• radar reflector, RORC type, 340mm x 340mm x 470mm (7m ² RCS)
• Raymarine ST-40 echo sounder
• sounding lead and line

 

Radio comms

• pod mounted DSC VHF Radio. Antenna fitted to port shrouds

 

Miscellaneous

• decks lights (LED) 4 nos fitted top main mast
• 10 ft. boat hook
• boarding ladder

 

Ships tender

• Colvin standard GRP Auray Fisherman's Dinghy fixed to stern davits with oars/rowlocks and fitting for OBM (not supplied)

 

Safety

• plastic covered steel lifelines
• bowsprit netting
• jackstays P/S
• secure points for attachment at companionway access
• 3 nos. smoke detectors wired to main switch panel
• 2 nos. lifebuoys
• any glass used to be toughened/reinforced.

 

Fire safety

• all foam used in soft furnishings certified as being fire retardant
• fire extinguishers:
• 2 nos. 5A/34B
• 1 nos. 21A/113B refillable 4kg
• 1 nos. fireblanket

The vessel shall comply with BS EN ISO 9094-1:2003 Small craft - Fire protection - Part 1: Craft with a hull length of up to and including 15m

 

Matters for other documents if any

 

Warranty

 

Third party inspection

 

Weld testing

 

Spare parts

---

last modified: Aug 24 06:04:57 2009 GMT
last compiled: Aug 24 09:03:33 2009 GMT on acer.kondosyokai.local

web services by kondo syokai

 

Acknowledgements

 

back tp top