Marine Engineering-Changhong Group

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Marine Engineering

Primarily engaged in offshore wind‑farm pile foundation construction, wind‑farm operations and maintenance, bridge construction, underwater anti‑corrosion engineering, and marine oilfield engineering projects. Core business areas include marine engineering technical consulting, wind‑farm operation and maintenance along with related technical advisory services, as well as bridge construction, wind‑farm foundation installation, underwater anti‑corrosion works, and marine engineering construction.

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Marine engineering.

Email:zsjtghy@foxmail.com

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Main Hull Parameters

Basic Parameters		Device Configuration
Total length	149.8m	Main generator set	6x2500kW
Type length	142.8m	Docked generator set	800kW
Beam	41.5m	Emergency generator set	400kW
Depth of hull	14m	Main thruster	3x2000kW
Design draft	10m	Bow thruster	3x1800kW
Speed	7.5kn	Positioning capability	DP2
Capacity	100P	Classification society	CCS
Deck load	10t/m²	★CSA Floating Crane, Ice Class B, SPS, PSPC(B), In Water Survey ★CSM CMCC, BRC, DP-2
Navigation area	Unlimited navigation area

Overall configuration

This vessel is a steel‑hull, self‑propelled, full‑rotation crane ship, featuring streamlined bow and stern with rounded corners along the longitudinal lines and at the bilge.

A electro-hydraulic full‑rotation crane is installed at the stern, with a maximum lifting capacity of 3,000 tonnes when stationary and a full‑rotation lifting capacity of 2,500 tonnes.

Upon completion, the vessel will primarily be employed for pile‑foundation construction and other offshore operations involving 10 MW and larger turbine units, with unlimited navigation area and flying the Five‑Star Red Flag.

The deck area is approximately 2,800 square meters, with an autonomous endurance of 45 days and a range of 2,000 nautical miles, accommodating a crew of 100.

The stern is equipped with three 2,000 kW azimuth thrusters, while the bow features three 1,800 kW bow thrusters, providing DP2 dynamic positioning capability.

It can be deployed and relocated over long distances, propelled by three fully rotating rudder‑propellers at the stern, with a maximum speed of 7.5 knots.

Operational sea conditions

The target operational area is within China’s territorial waters, with the flexibility to also cover Southeast Asian and European coastal waters.

The structural design temperature is specified at −15°C, thereby complying with the requirements for vessels operating in low-temperature regions as set forth in the 2019 amendment to the Rules for Classification of Steel Sea‑Going Ships.

	Air temperature	Sea water temperature	Relative humidity
Summer conditions	+45℃	+32 ℃	70 %
Winter conditions	-20 ℃	-2℃	90 %

3000t stern‑mounted fixed crane	Heeling 1.5° (including 0.5° trim)
	Heeling angle of 1.5° (including 1.0° roll)
Rotating crane, 2500 t	Heeling 1.5° (including 0.5° trim)
	Heeling angle of 3.5° (including 1.5° of roll)

Dynamic positioning capability

Operating condition and environmental requirements:

Significant wave height: 2.5 m

Surface current speed: 2.5 kn

Wind speed: 13.8 m/s

In normal operating mode, the thruster can withstand a maximum wind speed of 18.2 m/s when facing into the waves.

The maximum wind speed that can be withstood during crosswinds is 12.98 m/s.

The wind speed requirement for the in‑position operating condition is 13.8 m/s, with a corresponding allowable deviation of ±57°.

Main crane parameters

Main Technical Parameters		Main hook	Auxiliary hook	Small hook
Secure Workload (SWL)		See the hook load curve.
Maximum working radius		95m	103m	109m
Minimum working radius		27m	31m	34m
Lifting height	Above the main deck	110m	120m	130m
	Below the main deck	10m	10m	10m
Full-load lifting speed (outermost layer)		~2.5 m/min	~4 m/min	~18 m/min
Half-load lifting speed (outermost layer)		~4 m/min
No-load lifting speed (outermost layer)		~6 m/min	~8 m/min	~36 m/min
No-load amplitude variation time		≤20 min (from horizontal to the boom’s maximum elevation angle)
Full-load slewing speed		~0.06 r/min
No-load rotational speed		~0.12 r/min
Rotational range		Fixed stern crane + 360° full rotation
Ship inclination angle (transverse/longitudinal)		See the hook load curve.
Main Motor Parameters	Electric system	690V/50Hz/3PH		Protection rating	F
	Work system	S1		Insulation Class	IP44/IP56
	Power supplied on board	2800kW		Drive method	Electro-hydraulic drive

Component	Weight
Boom (excluding the boom hinge pivot)	~700t
Crane main body (including the slewing platform, A-frame, slewing carriage, winch, and other accessories; excluding the boom, wire ropes, and hook weight)	~1970t
Crane base	~670t
Main hook	~5t
Auxiliary hook	~3
Small hook	~10t
Sling hook + cargo-securing hook	~6t
Main hoisting wire rope	~105t
Luffing wire rope	~120t
Other wire ropes	~40t
Overall machine weight	~3800t

Service Areas

Unlimited navigation area Tier II + C2 Chinese and English materials	3,000-ton main crane DP2 Dynamic Positioning	Extra-deep size Azimuth thruster Side thrust Ballast Water Transfer
Rooted in China, reaching out to the world.	Lifting of offshore wind turbine foundation piles Salvage of shipwrecks and structural components Deep-sea pipe laying and submarine cable installation	Adapt to adverse sea conditions High degree of automation Optimize the design to improve efficiency.

Construction capability

● One 3,000-ton full-rotation main crane

● 1 full electric propulsion system

● 3 sets of azimuth thrusters + 3 sets of bow thrusters

● Average deck load: 10 tons per square meter

● A capacity of 100 people meets construction requirements.

The vessel has a lifting capacity of 3,000 tonnes and is capable of conducting assisted launching and installation of jacket structures, offshore wind turbine installation, as well as the hoisting and driving of foundation piles for offshore wind farms.

It simultaneously accommodates the construction of both the offshore bridge deck and the immersed tunnel segments.

The electric propulsion system features a high degree of automation and, in conjunction with the rudder‑propeller and thrusters, enables DP2 operations without anchoring, offering exceptional maneuverability and enhancing construction efficiency.

The 10 t/m² deck load exceeds that of vessels in the same class, providing a robust guarantee for the storage and transportation of heavy cargo.

The capacity has been expanded to accommodate the living and working needs of 100 personnel, support wind‑farm construction, and provide space for pipeline‑laying, cable‑laying, and other related operations.

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