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Overhead telescopic rescue boat davit, SWL 1t (Technical supply specification)


1. General Information (Operating Conditions)

The telescopic overhead rescue boat davit ensures reliable operation under the following marine environmental conditions:

  • Ambient air temperature: -30°C to +40°C
  • Relative humidity: max. 65% at +30°C; max. 85% at -30°C
  • Seawater temperature: max. +32°C, min. -2°C
  • Permanent heel: up to 10° to either side
  • Permanent trim: up to 5° by bow or stern
  • Wind pressure: max. 400 Pa
  • Hull vibration: standard shipboard vibration
  • Green water exposure: periodic sea spray on components

Operating conditions in stowed position:

  • Ambient air temperature: -35°C to +45°C
  • Wind pressure: max. 2000 Pa
  • Hull vibration: standard shipboard vibration

2. Purpose

The equipment is designed for the launch and recovery of a rescue boat.

A-frame telescopic davit with rescue boat capacity 1t side view outline drawing
Telescopic davit with rescue boat capacity 1t side view outline drawing

About

Vessel Overhead Launching and Recovery Equipment

An overhead launching and recovery appliance is a critical element of shipboard equipment, ensuring safe and controlled launch and recovery operations for rescue craft. This equipment is designed as an independent engineering system, operating independently of the boat’s specific characteristics. The overhead rescue boat davit is utilized on various vessel types and is engineered for marine environments where high mechanical reliability and predictable operation are required.

Intended Use and Operational Features

The primary purpose of the davit is to ensure the controlled transfer of the rescue boat between the deck and the water line. The overhead configuration enables efficient vessel space utilization and ensures stable equipment operation under heel, trim, and vibration conditions. The overhead rescue boat davit is integrated into shipboard safety systems and serves as a key technical assembly dictating crew readiness for routine and emergency operations.

Equipment Operation in Marine Environments

The operation of launching and recovery equipment occurs under continuous exposure to marine environmental factors. The structural design focused on maintaining component controllability under variable weather and operational conditions. The overhead rescue boat davit ensures stable workflows and enables the crew to perform operations with minimal additional workload, which is critical during time-critical and demanding situations.

Manufacturing and Industry Expertise

The design and manufacture of launching and recovery appliances require specialized marine engineering expertise and practical operational experience. Izhora Hydrosystems LLC manufactures overhead launching and recovery appliances, including the overhead rescue boat davit, in strict accordance with classification society rules and actual shipboard operating conditions. This approach ensures the equipment integrates seamlessly into vessel designs and meets shipowner expectations.


3. Scope of Supply

3.1 Telescopic Overhead Rescue Boat Davit

3.1.1 System Composition

ComponentQuantity
Telescopic davit1
Control cabinet with integrated control panel1
Portable control pendant for rescue boat davit1
Spare parts, tools, and accessories (STAs)1
Cable set (excluding external connection cables)1

3.1.2 Main Parameters

ParameterValue
Davit typeTelescopic
Rescue boat davit SWL10 kN
Maximum outreach2.5 m
Lowering height15 m
Lowering speed0.3 m/s (18 m/min)
Installed power18.5 kW
Hydraulic fluidAUP TU 38.1011258-8

3.1.3 Spare Parts, Tools, and Accessories (STAs) Kit

Manufacturer’s standard kit for 2 years of operation – 1 set.

3.1.4 Documentation

DocumentQuantity
Technical Passport1
Installation and Operating Manual1
Shipboard Testing Program and Procedure1
Factory Acceptance Test (FAT) Protocol1

3.1.6 Certificates

RMRS Certificate (RS Product Certificate) as per Form 6.5.30 – 1.

Telescopic Overhead Rescue Boat Davit, SWL 1 t – General Arrangement Drawing, Top View
Telescopic Overhead Rescue Boat Davit, SWL 1 t – General Arrangement Drawing, Top View

3.3 Combined 6-Person Rescue Boat

3.3.1 System Composition

ComponentQuantity
Combined rescue boat assembly, comprising:1 pc.
All-welded aluminum hull1 set
5-section inflatable PVC buoyancy tube1 set
Fuel tank, 24 l2 pcs.
Outboard motor1 pc.
Bench3 pcs.
External lifeline2 sets
Painter, 30 m length, with painter release hook1 pc.
Buoyant towing line, 50 m length1 pc.
Sea anchor with tripping line and hawser1 pc.
Compass with luminous card (backlight) and mounting bracket1 pc.
Foot pump with connection hose1 pc.
Synthetic sling with shackle1 set
Position-indicating light1 pc.
Buoyant oar2 pcs.
Boat hook, safety type1 pc.
Buoyant bailer1 pc.
Bucket1 pc.
Buoyant knife, safety type1 pc.
Sponge2 pcs.
Buoyant rescue quoit with 30 m buoyant line2 pcs.
Electric torch, waterproof, with spare battery set and bulb1 pc.
Whistle1 pc.
First-aid kit in waterproof packaging1 pc.
Searchlight, FOS-3 type1 pc.
Thermal protective aid (TPA)2 pcs.
Radar reflector1 pc.
Fire extinguisher1 pc.
Waterproof gear bag1 pc.
PVC buoyancy tube repair kit in case1 pc.
Retro-reflective tape for buoyancy tube5 pcs.
Outboard motor STA kit1 set
Deck cradles1 set
Ratchet lashings (tie-down strap for securing boat to davit)2 pcs.
Tie-down strap for securing boat to deck3 pcs.
Boat stowing cover1 pc.
Portable searchlight with rechargeable battery and charging unit1 set
Battery, 6V 9Ah1 pc.
Battery charger, 220V mains supply1 pc.

3.3.2 Main Parameters

ParameterValue
Length4.1 m
Breadth1.8 m
Buoyancy tube diameter0.4 m
Buoyancy tube materialPVC
Number of inflatable compartments5
Seating capacity5 persons seated + 1 person on a stretcher
Engine typeOutboard, gasoline
Engine power18.4 kW
Fuel capacity50 l
Weight, light craft295 kg
Weight, fully equipped with engine419 kg
Total launching weight920 kg
Speed, fully loaded6 knots
Towing force1.6 kN
Electromagnetic compatibility with other shipboard equipmentIn accordance with RMRS rules

3.3.3 Spare Parts, Tools, and Accessories (STAs) Kit

Manufacturer’s standard kit for 1 year of operation – 2 sets.

3.3.4 Documentation

DocumentQuantity
Technical Passport1
Installation and Operating Manual1
List of STAs1

3.3.5 Certificates

RMRS Certificate (RS Product Certificate) as per Form 6.5.30 – 1.

The davit and the boat are delivered with RMRS certificates (Form 6.5.30), as well as an extract from the registry of Russian industrial products in compliance with the requirements of the Russian Federation Government Decree No. 719 “On Confirmation of Production”.

Telescopic Overhead Rescue Boat Davit, SWL 1 t – General Arrangement Drawing, Front View
Telescopic Overhead Rescue Boat Davit, SWL 1 t – General Arrangement Drawing, Front View

4. Additional Requirements

  • The vessel is designed and constructed to the class of the Russian Maritime Register of Shipping (hereinafter referred to as RS): KM ⍟ ICE2 (hull) RN (SCI) AUT-3 EPP Battery system Passenger ship.
  • Flag during construction: Russian Federation.
  • Classification society: Russian Maritime Register of Shipping.
  • The overhead rescue boat davit remains fully operational under the conditions specified in Paragraph 2.3.1, Part VII “Machinery Installations” of the Rules for the Classification and Construction of Sea-Going Ships of the Russian Maritime Register of Shipping.
  • The reliability of the applied equipment and the vessel’s maintenance system are ensured by an STA kit in the volumes prescribed by RS rules and the Equipment Supplier’s recommendations.
  • Equipment service life: minimum 25 years.
  • The scope of supply includes:
    • Equipment
    • Special tools required for installation and maintenance
    • Instrumentation
    • Mating connections, counterflanges, fasteners, cable glands, and grounding bolts (as applicable)
    • Flexible joints (for shock-mounted equipment)
  • The scope of supply and system composition may be refined in accordance with the supplier’s recommendations.
  • Instruction plates, warning signs, inscriptions, and mimic diagrams are provided in Russian.
  • The overhead rescue boat davit is supplied with the manufacturer’s standard coating system, subject to approval by the shipyard.
  • Preservation coatings ensure an indoor storage life of 12 to 18 months.
  • The overhead rescue boat davit is delivered with the following operation and maintenance documentation:
    • Master document list in .doc and .pdf formats
    • Technical description
    • Storage and installation manual, including system schematics, electrical schematics, wiring and connection diagrams with electrical equipment ratings and cable gland entries, external connection diagrams, as well as general arrangement drawings with overall, installation, and interface dimensions
    • Operating manual
    • Watchkeeping instructions
    • List of STAs
    • List of instrumentation
  • The service maintenance providers are determined upon contract conclusion.
  • Each rescue boat engine is equipped with a heating cover.
  • Electromagnetic compatibility with other shipboard equipment is in accordance with RMRS rules.
  • The equipment is supplied with all required fasteners.
  • The equipment operates stably under increased vibration levels, as well as under vessel trim and heel conditions as per RMRS rules.
  • The davit features a closed steel structural frame.
  • The overhead rescue boat davit is supplied with a hydraulic power unit (HPU).
  • The equipment complies with the “General Regulations for Technical Supervision” of the Russian Maritime Register of Shipping (RS) Rules and is supplied with a Type Approval Certificate confirming its suitability for vessel installation.
  • The davit ensures the safe launch of the fully equipped rescue boat under adverse conditions of trim up to 5° by bow or stern and heel up to 10° to either side after boarding of the full complement.
  • The launching of the rescue boat handled by the davit, under fully loaded and equipped conditions (as well as light craft conditions), is achieved by gravity or stored mechanical energy independent of the vessel’s power supplies.
  • The davit design minimizes routine maintenance requirements. All components requiring regular maintenance by the crew are easily accessible and service-friendly.
  • The davit ensures controlled lowering of the fully loaded boat.
  • All blocks and sheaves are made of galvanized or stainless steel. Boat falls and lashings consist of galvanized steel wire rope. Axles and shafts are manufactured from stainless steel and fitted with bronze bearings. All bearings are equipped with grease nipples located in easily accessible positions. The remote brake control cables are made of stainless steel.
  • All electrical equipment is provided with external grounding bolts and cable glands.
  • The equipment is supplied complete with all required fasteners (bolts, nuts, washers, etc.).
  • The davit is equipped with a heating system.
  • The lowering mechanism can be operated by a single person from either the vessel’s deck or from within the rescue boat. The operator on deck maintains a clear line of sight to the rescue boat throughout the lowering sequence.

5. Manufacturer

Izhora Hydrosystems LLC


6. Warranty Period

12 months from the date of shipment, unless otherwise specified by the contract.


Contacts

Phone: +7 (812) 339-61-68

Email: contact@i-hydro.tech