NMX‑DAV‑30 / Rev 00 / marine deck machinery / davits · LARS 2026 · Product Page

NMX-DAV-30 · ENGINEERED TO ORDER — SHIP’S BOAT DAVITS & LAUNCH-AND-RECOVERY SYSTEMS

Over the side. Under control.

Name: Ship's Boat Davit & Launch-and-Recovery System
Brand: Neometrix

A ship’s boat works for its living — rescue, transfer, boarding, survey — and every task begins and ends the same way: the boat in the air between the deck and the sea, often with crew aboard, from a ship that rolls and may be under way. The davit is the machine that owns those minutes. Gravity and luffing davits whose brake-governed falls launch the boat with the ship blacked out; slewing single-arm davits for RHIBs and workboats; A-frame launch-and-recovery systems whose docking head captures survey gear and unmanned craft and kills the swing. Recovery is the harder half — both vessels moving — so the fall is held taut, never snatched. Proof-loaded to the lifting-appliance rules, surveyed for life — and we overhaul and recertify the davits already serving. Engineered to order — no delivered system is claimed.

Enquire — davits & LARS Capability sheet (PDF)

Illustrative image, not a delivered system — a ship's twin-arm gravity boat davit swung outboard with a plain grey rigid-hull inflatable boat suspended on twin wire falls over the water, davit winch and coiled falls on deck, guard rails and an unmarked grey deck edge, no people and no markings

Fig · 01 The dangerous minutes — the boat on the falls between deck and sea, held by the brake, the wire and the structure — illustrative, not a delivered system

Handles

ships’ boats + craftRHIBs · launches · unmanned

SWL

1 – 15 t classboat + crew + outfit

Launch

blackout-capablegravity, brake-governed

Recovery

seaway-ratedconstant tension, no snatch

Proof

2.2 × SWL patternload-tested + surveyed

ISO 9001 / 14001 Engineered to order Lifting-appliance rules Marine deck machinery Noida · India

Overview

The boat must go — and come back.

Nothing else aboard leaves the ship and returns as often as her boats. A rescue at night, a crew transfer in a swell, a survey instrument streamed and recovered on station — each one crosses the same gap: the ship’s side, with the sea moving under both ends of the journey. The davit exists so that crossing is machinery, not improvisation — the boat held by gripes in its chocks, by the arms over the side, by the falls in the air, by constant tension at the water — never, at any second, uncontrolled.

Illustrative image, not a delivered system — a davit winch station on a ship's deck: grooved wire-rope drum, band brake and hydraulic power unit, guarded gearing, a hanging pendant control with an emergency stop, wire falls leading up to sheaves, plain grey marine steelwork, no people and no text

Fig · 02 The winch and brake — powered hoist for the climb home, brake-governed gravity for the launch, an emergency path for the day everything else fails — illustrative, not a delivered system

Launch is gravity’s work. A boat davit is built around a humbling requirement of the lifesaving-appliance rules: the boat must go even with the ship dead — no power, no hydraulics, nothing but stored height. So the arms swing outboard and the boat lowers on its wire falls under gravity, speed governed by the winch brake — a controlled descent that asks nothing of the ship except that the brake was engineered, tested and maintained. Powered luffing and slewing make the everyday evolutions crisp; the gravity path underneath them is the guarantee.

Recovery is the machine’s. Coming home is the harder half: the boat alongside under the falls, both vessels rising and falling out of phase, the hook going on in spray. If the wire goes slack and then takes the load, the snatch multiplies the weight of the boat through the wire, the structure and the people in it — so the fall arrangement carries constant-tension and shock-absorbing stages that keep the wire taut as the sea lifts and drops the boat, and the winch takes her up smoothly, swings her in, and lands her back in the chocks.

Some loads are not boats. Survey systems, towed bodies and unmanned craft go over the stern or the side on A-frame launch-and-recovery systems — luffing cylinders carry the frame outboard, the wire runs over the apex sheave, and a docking head captures the load hard against the frame so it cannot pendulum against the transom. The discipline is identical; only the passenger changes. And because a davit serves for decades, the market’s steadiest demand is the overhaul: re-roping, brake and hydraulic refurbishment, and the proof-load recertification that keeps an old davit legal — work we undertake on systems we never built.

A davit is sized for its worst day, not its average one — the rescue boat away at night in a seaway, the ship blacked out — and it must be as certain then as on a calm harbour morning.

Never Uncontrolled

Custody from chocks to sea

Gripes, arms, falls, tension, chocks — the boat passes from one engineered hold to the next with no gap in between, in either direction, in any legal sea.

The Harder Half

Recovery without the snatch

Boat and ship move out of phase; a slack-then-loaded wire multiplies the boat’s weight. Constant tension keeps the fall taut — the load climbs, it is never jerked.

Blackout Launch

Gravity needs no permission

The launch path works with the ship dead — gravity lowering governed by a brake that is engineered, proof-tested and surveyed, because the worst day is the design case.

Architecture

Launch, recover, certify.

The schematic follows the cycle — stowed and griped, outboard, lower away, hook on and home — and shows the machine that runs it: the davit structure and falls, the winch and brake, the sea interface, and the controls and certification that make it lawful.

FIG · 03DAV ARCHITECTURE · DAVIT STRUCTURE / WINCH + BRAKE / SEA INTERFACE · CONTROL & CERTIFICATION

Fig · 03 The cycle and the machine — gravity launch, taut-wire recovery, and the proof loads and surveys that keep both certain for decades

Arc · 01

Davit & Falls

Arms, pivots and pedestal, cradle and chocks, wire falls and sheaves, gripes for sea stowage — marine structure detailed for salt, shock and decades.

Arc · 02

Winch & Brake

Powered hoist for recovery; brake-governed gravity lowering for launch — blackout-capable — with emergency lowering and hand paths behind it.

Arc · 03

Sea Interface

Constant-tension and shock-absorbing fall stages against the snatch; painters and fendering at the boat; docking head capture on A-frame systems.

Arc · 04

Control & Certification

Pendant and local control, limits, overload and slack-wire protection, e-stops — and the proof-load tests and periodic surveys of the lifting-appliance rules.

Have a davit, LARS or overhaul requirement? Send the boat particulars, the deck and the ruleset — a clause-by-clause compliance matrix within two working days · [email protected]

Send tender spec

Specifications

Reference machine, built to the boat.

The parameters below describe a reference system. The arm geometry, winch rating, fall arrangement and control fit all follow from three givens: the boat or craft, the deck it lives on, and the ruleset it must satisfy.

Illustrative image, not a delivered system — a stern A-frame launch-and-recovery system on an empty working deck: grey A-frame on twin luffing hydraulic cylinders, wire rope over the apex sheave with a docking head hanging above the deck, deck sockets and cleats, sea beyond the transom, no people and no markings

Fig · 04 The A-frame LARS — luffed outboard on its cylinders, the docking head waiting to capture the load and kill the swing — illustrative, not a delivered system

Where davits go wrong

In the dynamics and the years, not the lifting. A fall that goes slack in a trough and loads in a crest snatches — multiplying the boat’s weight through wire, structure and crew; a brake sized for the catalogue rather than the descent fades on a long lower with a full boat; a davit with no true gravity path fails precisely when the ship does; salt and neglect find every unprotected pin and un-exercised mechanism; and a lapsed certificate makes a sound davit legally unusable — the overhaul-and-recertification demand that fills the market’s own repair tenders.

So the fall arrangement carries constant-tension and shock-absorbing stages sized against the seaway, not the brochure; the brake is engineered for the worst descent and proven by dynamic test; the gravity path is preserved through every powered convenience layered above it; the structure is detailed and coated for decades of salt; and the whole machine enters service through proof load and survey — then stays legal through the re-roping, brake exams and recertification programmes we run on davits whoever built them.

Full specification — expand

System	Ship’s boat davit & launch-and-recovery system — gravity / luffing / slewing / telescopic davits and A-frame LARS with winches, controls & certification; engineered, built, installed, load-tested & certified
Function	Launches and recovers ships’ boats and craft from a moving ship — the boat never uncontrolled between the chocks and the sea, in either direction
Capacity	SWL 1 – 15 t class — boat + crew + outfit; geometry and outreach to the boat and the deck; multi-arm or single-arm to suit
Davit Types	Gravity / luffing multi-arm boat davits · slewing / telescopic single-arm davits for RHIBs & workboats · A-frame LARS over stern or side
Launch Path	Gravity, brake-governed — capable with the ship fully blacked out; powered luffing / slewing for everyday evolutions layered above the gravity guarantee
Recovery	Powered hoist with constant-tension / shock-absorbing fall stages — wire held taut in the seaway, no snatch loading of boat, wire or structure
LARS & Docking	A-frame on luffing cylinders, apex sheave, docking head / snubber capture against pendulation — survey systems, towed bodies, unmanned craft (the craft is the customer’s)
Winch & Brake	Drum, gearing and band / disc brake sized for the worst descent and proven by dynamic and static brake tests; emergency lowering and hand paths
Controls & Safety	Pendant & local control, e-stops, travel limits, overload & slack-wire detection, interlocks, load monitoring — gripes, painters & fendering at the boat
Testing & Certification	Proof load to the lifting-appliance pattern — structural overload to 2.2 × SWL, brake tests — witnessed, documented, then periodic survey through life (SOLAS / LSA-code pattern for lifesaving stations; class lifting-appliance rules)
Service	Overhaul, re-roping, brake & hydraulic refurbishment, proof-load recertification & AMC of davits already serving — whoever built them — the market’s recurring demand
Sourcing	Wire rope, release hooks & standard drive units are bought-in certified items; the boats & craft are the customer’s; Neometrix engineers the structures, winch integration, hydraulics, controls, installation, load test & certification
Status	Engineered to order · sized to the boat, the deck & the ruleset · grounded in the delivered marine deck-machinery, hydraulic, fabrication & controls franchises · no specific delivered davit or LARS is claimed on this page

PDF · 1 page

Boat Davits & Launch-and-Recovery — Capability Sheet

Tender Response

Send boat particulars, deck & ruleset — compliance matrix in two working days

Variants

One discipline, the machine the deck needs.

Requirements call it a boat davit, a rescue-boat station, an A-frame, a LARS, or the overhaul of one already serving. The discipline — a load that is never uncontrolled between deck and sea — is common; the machine follows the boat and the deck.

Var · 01

Gravity & Luffing Boat Davits

Multi-arm stations for seaboats, rescue boats and landing craft — gravity launch under the brake, powered recovery, gripes and chocks for sea.

Var · 02

Slewing & Telescopic Davits

Single-arm hydraulic davits for RHIBs and workboats on smaller decks — luff, slew and telescope through one compact pedestal, with shock-absorbed falls.

Var · 03

A-Frame & Single-Point LARS

Stern and side frames on luffing cylinders with docking-head capture — survey systems, towed bodies and unmanned craft, launched and recovered on station.

Var · 04

Overhaul, Load Test & Refit

Davits already serving — re-roped, re-braked, re-hydrauliced, proof-loaded and recertified, and supported under AMC: the market’s recurring demand.

Applications

Where the boat goes over the side.

Wherever a ship must put something into the sea and get it back — crewed or not.

A · 01Naval seaboat & rescue-boat stations

A · 02Landing-craft & workboat handling

A · 03Survey & ocean-research vessels

A · 04Unmanned-craft launch & recovery

A · 05Coast-guard & patrol fleets

A · 06Overhaul, load test & recertification

FAQ

Common questions.

Plain-language answers from the engineering team.

Q · 01 Why is recovery harder than launch?

Because launch spends energy and recovery must absorb it. Going down, the boat descends on the falls at a speed the winch brake governs — a fundamentally settled problem. Coming home, the boat lies alongside under the falls while boat and ship move out of phase: the sea lifts the boat a metre and drops it two, the hook goes on in spray, and the wire alternates between slack and loaded. That alternation is the enemy. A wire that loads from slack snatches — a dynamic multiplication of the boat’s weight that punishes the wire, the davit structure, the release gear and the crew sitting in the boat. The engineered answer sits in the fall arrangement: constant-tension stages that pay out and haul in as the sea moves the boat, keeping the wire taut before the hoist ever starts, and shock absorbers that soften what tension cannot prevent. Then the winch takes her up smoothly, the arms swing in, and the boat lands in her chocks. When a requirement quotes a recovery sea state, this — not the lifting capacity — is the clause doing the work.

Q · 02 What happens when the ship loses power?

The boat still goes — that is the point of a gravity davit. The lifesaving-appliance tradition is built on a blunt assumption: the day the boat is needed most may be the day the ship can give it nothing — no electrical power, no hydraulics, perhaps a list. So the launch path is arranged to run on stored height alone: release the gripes, and the arms and boat move outboard and down under their own weight, the descent governed by the winch brake — a mechanical device, engineered for the fully laden boat on the longest lower, proven by dynamic test with overload, and exercised on a maintenance calendar. Powered luffing, slewing and hoisting are layered above that guarantee for everyday work, never instead of it; and the recovery side carries its own degraded modes — emergency lowering from accumulators, hand-crank paths where the ruleset asks. It is a machine designed backwards from its worst day — which is why the rules then insist the worst day be rehearsed: the proof loads, brake tests and drills that keep the guarantee real.

Q · 03 What is the difference between a boat davit and a LARS?

The passenger, and what the passenger implies. A boat davit handles a crewed boat: people ride the hook, so the machine is shaped by the lifesaving-appliance rules — gravity launch, blackout capability, gripes and chocks, fall speeds and brake margins set with human beings in the load path. A launch-and-recovery system handles loads that are usually uncrewed — survey packages, towed bodies, unmanned surface craft — and its geometry follows the task: an A-frame over the stern or side, luffed outboard on hydraulic cylinders, the wire over the apex sheave. Its characteristic problem is not the snatch but the pendulum — a load swinging on a wire beside a moving transom — so the frame carries a docking head or snubber that captures the load hard against the structure the moment it leaves the water, and releases it only at the water on the way out. Between the two sit the hybrid cases — single-arm davits that serve a RHIB one day and an instrument the next. The engineering house is the same: structures, winches, brakes, hydraulics, controls, certification.

Q · 04 How is a davit tested and certified?

By demonstration, witnessed and documented — the lifting-appliance world does not accept calculation alone. At build, materials and welds carry their certificates and NDT records. At completion comes the proof load: the structure takes a static overload — the lifesaving-appliance pattern runs to 2.2 times the safe working load — held and inspected, with test weights or water bags standing in for the boat. The winch brake is proven dynamically: the test load lowered at speed and arrested, repeatedly, because the brake is the launch path’s whole guarantee. Function tests walk every limit, interlock, overload trip and emergency path. Then the certificates begin their working life: periodic surveys and examinations, load tests repeated at rule intervals or after repair, wire ropes examined and re-roped on condition or calendar, brakes re-examined, hooks and release gear inspected. A davit that misses this calendar becomes legally unusable regardless of its mechanical health — which is why recertification programmes for davits already in service are as much a part of this product line as new machines.

Q · 05 Can you handle unmanned craft?

Yes — as a load class with its own habits. An unmanned surface craft changes the problem in three useful ways and one hard one. Useful: no crew rides the hook, so the human-rated launch clauses relax; the craft’s shape is consistent, so the capture interface can be engineered rather than improvised; and the evolution repeats identically, which suits automation. Hard: there is no coxswain to bring the craft to the hook — so the recovery end leans on the docking head, guide funnels and capture geometry to find, seize and hold the craft from the machine’s side of the interface, and the control system coordinates the capture, the tension and the lift as one sequence. We build these as we build everything on this page: the frame or davit, the winch and tension stages, the docking and capture hardware to the specified craft interface, and the controls — with the craft itself, its systems and its tasks entirely the customer’s. The craft is cargo to us; the machine that puts it to sea and takes it back is the product.

Q · 06 What do you build, and what is bought-in?

We build the system as a machine, from franchises we have delivered. What Neometrix does: the davit and A-frame structures — arms, pivots, pedestals, cradles and chocks, detailed for decades of salt — from our marine fabrication line; the winch integration — drums, gearing, brakes sized for the worst descent, gravity and emergency lowering paths — the same discipline as our delivered deck-machinery work; the hydraulics — luffing, slewing and telescoping circuits, power units, accumulators; the fall arrangements — sheaves, constant-tension and shock-absorbing stages, docking heads and capture hardware to the specified interface; the controls — pendants, limits, overload and slack-wire protection, interlocks, load monitoring; and the shipboard installation, proof-load testing and certification — plus the overhaul, re-roping and recertification of davits already serving, whoever built them. What is bought-in certified: wire rope and its terminations, release hooks and their approvals, standard motors and drive units, and proprietary sensors. The boats and craft are the customer’s. Engineered to order; grounded in the delivered marine deck-machinery, hydraulic, fabrication and controls franchises; no specific delivered davit or LARS is claimed on this page.

↗

The naval line from Neometrix.

The deck-machinery house the davit is built from, the ship’s other doorway, and the same custody rule applied to her aircraft — engineered at our Noida facility.

↗ Deck Machinery

Marine & Naval Hydraulic Deck Equipment

The winch, hydraulic and brake house this davit line is built on.

↗ Marine Access

Marine Gangway & Accommodation Ladder

People board by the ladder; boats leave by the davit — the ship’s two doorways.

↗ Aircraft Handling

Shipboard Helicopter Traversing & Handling System

The same rule applied to the ship’s aircraft: never free on a moving deck.

Browse all Neometrix product lines.

Get a quotation

Send the boat
and the deck.

The defence programmes desk replies within two working days with a clause-by-clause compliance matrix and a budgetary quotation. Write to [email protected] or use the form.

Enquire — davits & LARS Capability sheet (PDF) +91 7777 876 876

ISO 9001 / 14001 ENGINEERED TO ORDER — SHIP’S BOAT DAVITS & LAUNCH-AND-RECOVERY SYSTEMS GRAVITY + SLEWING DAVITS · A-FRAME LARS · WINCHES & BRAKES · LOAD TEST & RECERTIFICATION ENGINEERED IN NOIDA · INDIA

Over the side. Under control.

The boat must go — and come back.

Custody from chocks to sea

Recovery without the snatch

Gravity needs no permission

Launch, recover, certify.

Davit & Falls

Winch & Brake

Sea Interface

Control & Certification

Reference machine, built to the boat.

Where davits go wrong

One discipline, the machine the deck needs.

Gravity & Luffing Boat Davits

Slewing & Telescopic Davits

A-Frame & Single-Point LARS

Overhaul, Load Test & Refit

Where the boat goes over the side.

Common questions.

The naval line from Neometrix.

Marine & Naval Hydraulic Deck Equipment

Marine Gangway & Accommodation Ladder

Shipboard Helicopter Traversing & Handling System

Send the boat
and the deck.

Similar Products

Share This Page

Over the side. Under control.

The boat must go — and come back.

Custody from chocks to sea

Recovery without the snatch

Gravity needs no permission

Launch, recover, certify.

Davit & Falls

Winch & Brake

Sea Interface

Control & Certification

Reference machine, built to the boat.

Where davits go wrong

One discipline, the machine the deck needs.

Gravity & Luffing Boat Davits

Slewing & Telescopic Davits

A-Frame & Single-Point LARS

Overhaul, Load Test & Refit

Where the boat goes over the side.

Common questions.

The naval line from Neometrix.

Marine & Naval Hydraulic Deck Equipment

Marine Gangway & Accommodation Ladder

Shipboard Helicopter Traversing & Handling System

Send the boatand the deck.

Similar Products

Share This Page

Send the boat
and the deck.