naval survey

Surveying a 49 metres Classic Schooner

Survey Performance Requirements for Auxiliary Schooner “Invader” 1905

Brief history

Invader was launched in 1905 and built by the famous George Lawely & Son – South Boston shipyards using a special nickel steel alloy , following the design of Albert Stanton Chesebrough, grandson of Nathanael Herreshoff and Edward Burgess, the best designers of their era .

Invader was a very fast yacht thanks to her design, construction and the enormous sail plan . Among others her victory on the Transpac race of 1926 in elapsed and compensated time was unforgettable.

Rather 100 years after her construction she was restored toroughly in Viareggio and fitted out consequently in La Spezia.

Dimensions and Main features

  • Name: Invader
  • Port reg.: Road Harbour B.W.I. Official No. 736553
  • Type: Auxiliary Schooner
  • Designer: Albert Stanton Chesebrough
  • Builder: George Lawley & Son Corp. Shipyard South Boston
  • Hull No. : #573
  • Year: 1905
  • The outstanding yacht is built in steel with deck and superstructures in teak
  • Refitted: 2001—2003 in Viareggio
  • Classification: Rina Malta Cross A 100:1
  • L.O.A.: 41.60 M
  • L.O.A. With Bowsprit: 49.00 M L.O.A. With Bowsprit And Boom 59.00 M
  • L.W.L.: 29.72 M
  • Draft: 4.35 M
  • Beam: 7.88 M
  • Displacement full load: 214.140 tons;
  • Gross Tonnage: 133 tons Net tons 187.00 tons
  • Engine: No. 1 Caterpillar Mod. 3406e Di-Ta 700 Hp
  • Zf Transmission Bw 190 Serie
  • Generators: No. 2 Kohler Mod. 55efoz 55 Kw
  • No. 1 Kohler Mod. 17.5efoz 14.5 Kw
  • Sailing Rig: Gaff Schooner
  • Sail Area:
  • 455.00 Mq Mainsail
  • 169.00 Mq Foresail
  • 164.50 Mq Yankee
  • 77.72 Mq Moonsail
  • 86.24 Mq Fore Topmast Staysail
  • 48.00 Mq Queen Sail
  • 65.70 Mq Gaff Top-Sail
  • 52,50 Mq Fore Gaff-Top-Sail
  • Accommodations for 6 guests in 3 cabins and 5 crews in 3 cabins.

* * *

To carry out the survey, codified survey performance requirements were used. For this reason, the report must be red having in mind the procedure used based on the following guideline.

1. Hull profile inspected below and above the waterline for distortion or deformation and identification of causes as applicable.

2. Hull inspected below and above the waterline for cracks, damage or corrosion that is causing structural weaknesses or wastage.

3. Carry out a Thickness UT Measurement Survey below the waterline. (ISO 16809:2012)

4. Adequacy of the metal protection coating systems inspected, including the secureness, operation and likely lifetime of any sacrificial anodes.

5. The secureness of installation and the sealing of the portlights inspected, the fastenings and the suitability of the materials used also inspected.

6. Inspection of all inlets, discharges (including garbage chutes), bow thruster tubes, scuppers, vents, exhausts and outlets for watertightness and weathertightness, and for compliance with any conditions of assignment. Check-up of effectiveness of valves and seacocks. No valves were dismantled as part of the survey. Examination inside the boat. Check for de-zincification by scraping. All valves opened and closed to their full extent where possible. Any fixing bolts hammer tested where accessible. Bodies of metal valves or sea cocks tested with a hammer inside the boat. Fittings aggressively tested inside the boat for security in the hull. Hose clips inspected and hoses aggressively tested for security. Check-up of 2 clips which correctly fitted below water line on outlet spigot. Check-up of the vessel to be lying fair to hull. Access to seacocks checked. Type of material suitable for location.

7. Inspection of any sea chests clear of marine growth and that grills, grates and roses allow water to pass through, and that fastenings were sound. Inspection of the fittings related to the propulsion and steering systems for secureness and watertightness. Inspection of the functional condition of valves and seacocks in their dismantled state.

8. Inspection of interior hull surfaces for cracks, damage, and corrosion causing structural weaknesses or wastage and where the surfaces were covered by linings. Inspection beneath the linings by sample removal or intrusion through the lining, to an extent determined by the nature of the lining and other indications of risk to the condition of the hull.

9. Inspection of internal bilge compartments for damage, cracks, corrosion and indications of oil and water in the bilges. Check-up for blockages to drainage holes.

10. Inspection of lockers, storage places and other voids for cracks, damage, corrosion causing structural weaknesses or wastage.

11. Inspection of internal bulkheads and partitions for cracks, damage, corrosion causing structural weaknesses or wastage.

12. Inspection and test hinge and for the securing mechanisms of internal access doors.

13. Inspection of areas around deck hatches for cracks, damage, and leakage, including the condition and operation of securing dogs, gaskets and hatch drains.

14. Inspection of engine and gearbox mountings for movement, damage and excessive wear, including damage where secured to the hull. Shaft visually checked while rotating for straightness and freedom to turn. Tested with magnet for quality of stainless steel. Stern gland checked with mirrors for corrosion on underside. Flexible hosing checked for splits if fitted. Any clips checked with mirror and hammer. Security of stern gland checked. Stern tube security checked. All bronze is scraped and checked for dezincification. Corrosion checked visually on leg. The shaft visually checked while rotating for straightness and freedom to turn. Gear engagement checked forward and astern. Cables checked where visible.

15. Inspection of hull plating around the intake strainer and mounting flange for impact damage, cracks, damage or corrosion that is causing structural weaknesses or wastage or water ingress.

16. Inspection of the drive mountings supporting structures and joins and fastening bolts for cracks, damage, and corrosion causing structural weaknesses or wastage, and water ingress.

17. As applicable, inspection of stern tubes, shaft log and rubber tube mountings and surrounding structures for corrosion and leakage. Rudder tube was checked for security inside the hull. Play in bushes checked. Wheel steering, cables checked where visible, quadrant checked for security. Emergency tiller located.

18. Inspection of the installation and seal of portlights in the hull, for secureness, watertightness and weathertightness. Also check-up of the effectiveness of portlight and deadlight dogs, and ready access to deadlights or blanks.

19. As applicable, inspection of posts, towing bollards or masts where secured to the hull, for damage, loose fittings, and secureness of bonding to strength members. Also check of their entry through the deck for watertightness.

20. Inspection for distortion or deformation of cabin and superstructure profile. Inspection of bulkheads and structural stiffening including Internal mouldings.

All access to reinforcement structure was checked – opening lockers, under berths, lifting sole boards where not screwed down – for signs of corrosion. Visual and physical tests carried out as required. Bulkheads were carefully hammer sounded near the deck, hull and floors for signs of corrosion and stress. Area around mast base or king post checked for compression issues.

21. Inspection of deck for corrosion, inspection of teak layering, damage, and cracks that affect deck integrity or allow water ingress to the hull interior. Also check-up of surface of deck and any cockpit sole for slip resistance.

22. Inspection of the water-freeing arrangements (including the operation and effects of covers, grids and flaps on water freeing). As applicable, check-up of cockpit drains and duckbill drains for effectiveness.

23. Inspection of the anchor winch mounting structure for movement (by running the anchor winch motor and gypsy) and wear and tear on hull plating in impact zone.

24. Test secureness of guardrail and handrail mountings. Check-up of through-bolts for tightness, and area around stanchions for cracking, corrosion and watertightness. Where flexible wires are used as lifelines, check-up of the condition and tightness of siblings.

25. Inspection of windows, skylights and screens for secureness and weathertightness, including the suitability and effectiveness of shutters, deadlights and storm covers, as applicable.

26. Inspection of all watertight and weathertight doors and sills for effectiveness and compliance with all conditions of assignment. Check-up of doors and surrounding structures for damage, condition of the door seals, hinges, latches and securing dogs for watertightness or weathertightness, as applicable.

27. Inspection of all deck hatch covers, coamings, gaskets and securing mechanisms for watertightness or weathertightness, as applicable, and for compliance with any conditions of assignment. Testing of the locking mechanisms and check-up of the hatch drains.

28. Inspection of all air pipes, ducts and ventilators for compliance with height and coaming requirements in rules and all conditions of assignment. Check-up of closure mechanisms, seals and fastenings for weathertightness.

29. Inspection of machinery space openings for robustness of casings, and compliance of sill heights with all conditions of assignment.

30. Inspection of manholes for adequacy of openings, weathertightness of covers and fastening mechanism, and compliance with all conditions of assignment.

31. Inspection of spurling pipe closures for weathertightness and compliance with all conditions of assignment. Inspection of chain lockers for effective drainage.

32. Inspection of all internal access doors for their operation and secureness of attachment.

33. Inspection of all deck and superstructure ladders, for the safety of their tread and their fastenings to the ship structure.

34. All attachment points of the rigging were tested visually with 10 x magnification, nuts and bolts struck with hammer against sheer where possible, checked with magnet for quality of steel where possible, fittings tested, checking for movement, distortion of deck, check-up of terminals following line of rigging, check-up for seepage via deck fittings, wood on bulkheads Inspection was restricted to what could be reached and viewed from deck on the mast and rigging. Visual check for corrosion, wear, visual check for standing in column and undistorted, mast heel checked for compression, fittings checked where accessible for security and stress cracking, winches in working order, spreader sockets for movement by swigging shrouds. Check-up of terminals, riggings screws, toggles and where the wire enters the terminals under 10x magnification for corrosion and any visible damage to wire, visible check -up of the angles where the terminals enter the mast in line with the rigging wires. Check-up for good articulation of toggles. Check-up of split pins if in place if they could be seen.

35. Check-up of other deck gear and fittings, turning blocks, jammers, frames securely fixed. The winches fitted were all tested as far as possible but not under load, for play on base and were free to turn.

36. Bilge Pumping Arrangements: Check-up if they were adequate for type of vessel, operated if possible, checking of strum boxes fitted, checking clips secure and hose condition where accessible.

37. Fire-fighting Equipment: Checking of service dates, checking of gauges, checking if adequate for vessel. Condition of cylinders, no Halon aboard, smoke detectors all checked.

38. Check-up of Lifesaving and Emergency Equipment: Checking of condition, service dates and if it is adequate for area of operation.

39. Engine and Installation: The engine was visually checked using camera and mirrors for difficult to access areas looking for condition and leaks of oil or coolant. Flexible mounts were hammer tested looking for security and bonding failures. The seawater cooling system was traced and all clips checked where visible. The sea water pump was checked for leaks. All parts were checked for corrosion. Any asbestos present noted, checking of condition of compartment. The boat was afloat and the engine was started and run underload up to operating temperature and checked for leaks, exhaust emissions – blue smoke = oil burning etc. Gears engaged, shaft heard and seen turning.

40. Fuel System: Tank condition visually checked where accessible for condition, Tank security checked, Type of pipe work and hoses marine grade, well supported and free from stress or damage. Shutting of valve location and condition. Checking of water separator fitted aft tank and condition. Checking of location and condition of site gauges. Checking security of hoses and system for visible leaks or signs of leakage. Correct stowage of petrol away from source of ignition. Accommodation and onboard Systems checked.

41. Accommodation General: Inspection in all lockers and cupboards for dampness, cracks, issues. Condition of furniture and wood evaluated only, checking if ventilation is adequate for cooking and overnight.

42. Fresh Water Tanks, Delivery and disposal. Checking of material and condition of tank. Condition and type of hoses where visible were checked.

43. Heads: General condition and security of fittings, hoses, clips checked. Condition of tanks checked. Operated afloat.

44. Electrical Installation: DC circuits, security of batteries, battery terminal insulation, battery visual condition checked. Ventilation checked. Type of circuit protection, condition and quality of system and operation of items checked. Switch test of DC systems checked. Checking of vessel fitted with navigation lights of correct size, adherent to regulations and securely mounted and seen working. 240 V Circuits Provision of Shore side 30ma RCBO earth breaker, Circuit breakers for all appliances of appropriate value, Condition and quality of system and operation of items checked.

45. Electronic and Navigation Equipment: Made note of items aboard and check-up of operation.

46. Heating and refrigeration. The general quality of the installation was checked.

Emiliano Parenti and Luca Marziale – LM Marine Surveyors

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