DNV Class · ICE-1C · MARPOL Annex V

BUILT
FROM
STEEL.

Raw plate to sea trial. Trawlers, longliners, and crabbers
engineered for 30-year working cycles.

WL
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Keel-Laying to Sea Trial26mm Hull PlateDNV ClassedTrawlers · Longliners · CrabbersPatrol & Research Hulls30-Year Design LifeISO 9001:2015ABS · BV · GL CertifiedArctic-Grade SteelKeel-Laying to Sea Trial26mm Hull PlateDNV ClassedTrawlers · Longliners · CrabbersPatrol & Research Hulls30-Year Design LifeISO 9001:2015ABS · BV · GL CertifiedArctic-Grade Steel

Every Number
Earned.

Hover each card to see the build evidence behind the specification. Numbers sourced from classification society surveys, not marketing copy.

26mm

AH36 high-tensile steel plate throughout the midbody. Keel b

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Plasma cutter cutting through thick steel plate with orange sparks flying
mm · Hull Plate Thickness

26mm

AH36 high-tensile steel plate throughout the midbody. Keel bar runs 40mm solid. Every weld UT-tested to class requirement.

4,200nm

Twin Wärtsilä main engines. 180,000L fuel capacity. Sufficie

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Commercial fishing vessel at sea in rough ocean conditions
nm · Unrefueled Range

4,200nm

Twin Wärtsilä main engines. 180,000L fuel capacity. Sufficient for 28-day deep-water grounds without port call.

14mo

From first steel cut to classification survey and sea trial.

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Crane lowering a large steel ship component into dry dock
mo · Keel to Delivery

14mo

From first steel cut to classification survey and sea trial. Modular block construction compresses schedule without compromising weld integrity.

680GRT

Standard mid-water trawler class. Custom designs from 120 GR

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Large commercial fishing vessel stern launching into the water
GRT · Gross Register Tonnage

680GRT

Standard mid-water trawler class. Custom designs from 120 GRT coastal crabbers to 1,800 GRT factory longliners.

340MPa

AH36 structural steel specified for all primary frames, stri

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Welder working on steel ship frame with bright arc flash
MPa · Steel Yield Strength

340MPa

AH36 structural steel specified for all primary frames, stringers, and longitudinals. Exceeds Lloyd's Register minimum by 18%.

47hulls

Forty-seven commercial hulls operating across the North Atla

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Fleet of commercial fishing vessels moored at a working dock
hulls · Vessels Delivered

47hulls

Forty-seven commercial hulls operating across the North Atlantic, Bering Sea, and Southern Ocean. Zero structural warranty claims in 18 years.

All specifications subject to final contract. Classification society survey documentation available on request.

Select Your
Hull Class.

Large midwater trawler vessel operating in rough North Atlantic seas
Fleet owners · Fishing cooperatives

Midwater Trawler

Designed for sustained deep-water fishing operations on the Grand Banks, Norwegian Sea, and Bering Sea grounds. Fully integrated RSW or freezer hold systems. Net drum and trawl winch rated to 80 tonnes bollard pull.

LOA Range52 – 72 m
Gross Tonnage450 – 1,200 GRT
Hull Plate26mm AH36
Main Engine2,400 – 4,800 kW
Range4,200 nm
Hold / Tank400 – 900 m³
Ice ClassICE-1C
Build Time14 – 18 months

Steel Plate
to Sea Trial.

Total Programme
14 – 18 months
keel-laying to delivery

Naval architecture drawings, structural FEA analysis, and stability calculations submitted to classification society. All scantlings confirmed before first steel order.

Full 3D model in AVEVA Marine
DNV / BV / GL plan approval
Structural FEA on critical frames
Stability booklet issued
Owner approval drawings signed
Naval architect reviewing technical ship design drawings at desk

CNC plasma cutting of all structural members from certified AH36 plate. Hull fabricated in modular blocks for parallel assembly — reducing schedule by up to 22% versus sequential methods.

CNC plasma and oxy-fuel cutting
AH36 mill certification for all plate
Modular block construction — up to 12 simultaneous
All welds to IACS W28 procedure
NDT on all primary structural welds
Industrial plasma cutter cutting through thick steel plate with bright orange sparks

Pre-fabricated blocks erected in dry dock by 100T overhead crane. All seams welded and radiographically tested. Keel certificate issued by attending surveyor.

100T overhead crane erection
Laser alignment of all blocks ±2mm
All seam welds UT and RT tested
Rudder stock and shaft installation
Keel certificate — classification surveyor
Large crane lowering steel ship hull block into dry dock at shipyard

Main engine installation, piping, electrical distribution, navigation and communication suites, and fishing gear systems installed concurrently with hull completion. Owner's representative on site throughout.

Main engine and gearbox alignment
Hydraulic fishing gear systems
GMDSS and ECDIS navigation suite
RSW / freezer hold installation
Full SOLAS safety systems
Ship engine room with large marine diesel engine being installed

Stern-first launch, inclining experiment, harbour acceptance trials, and full sea trial to classification society requirements. Vessel delivered with all certificates, stability booklet, and training for crew.

Stern-first dry dock launch
Inclining experiment — stability confirmed
Harbour acceptance trials (HAT)
Full sea trial — classification surveyor
Delivery with all class certificates
Newly built fishing vessel launching stern-first into the water at shipyard

Request a Build
Specification.

Primary Path — Build Specification Request

Response within 2 business days · All enquiries treated as confidential

Secondary Path

Download Fleet
Comparison PDF

Side-by-side comparison of all four vessel classes — LOA, GRT, build cost range, operating cost per tonne, and fuel efficiency. 14 pages. Used by procurement teams comparing yards.

14-page technical comparison
Build cost range by vessel class
Operating cost per tonne at sea
Classification society comparison
Sample build programme Gantt
47Hulls Delivered
18 yrsOperating History
0Structural Warranty Claims
DNV · BV · GLClassification Bodies

Keel Marine Fabrication

Currently accepting build enquiries — 2026 / 2027 slots available