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Premium Boat Manufacturing Since 1999

Over 24 years of shipbuilding excellence. Custom aluminum and fiberglass vessels for passenger transport, patrol, fishing, rescue, and commercial operations.

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24+
Years of Experience
300+
Boats Built Annually
100K+
Sq Meters Facility

About Grandsea Boat

Qingdao Grandsea Boat Co., Ltd has over 24 years of shipbuilding experience and operates from a facility exceeding 100,000 square meters with 600 meters of coastline. We operate two dedicated workshops — one for small fiberglass and aluminum boats, and another located seaside for larger vessel construction.

Our mission is to provide innovative marine products that create real value for our customers. With a professional boat design team and advanced manufacturing capabilities, we deliver high-performance vessels trusted by clients across the globe.

  • Strategic cooperation with Austal, world’s largest aluminum shipbuilder
  • Expertise in aluminum and FRP (fiberglass) vessel construction
  • Custom boat building from concept to sea trial
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Grandsea Boat Manufacturing Facility

Strategic Cooperation

In 2016, Grandsea Boat partnered with Austal, the world’s largest aluminum shipbuilder, to establish a joint venture — Aulong Shipbuilding Co., Ltd. This collaboration enables us to deliver high-performance aluminum vessels with cutting-edge design and engineering.

Global Expertise

Leveraging Austal’s global leadership in aluminum shipbuilding for superior performance and durability.

High-Performance Vessels

Advanced hull designs and lightweight aluminum construction for speed, fuel efficiency, and stability.

Innovative R&D

Continuous investment in research and development to deliver next-generation marine solutions.

How We Build Your Custom Boat

1

Mold Creation

Build the simple female mold with precision tooling for consistent hull quality.

2

Gel Coat Application

Painting the gel coat to ensure a smooth, durable, and UV-resistant finish.

3

Hull Reinforcement

Lay fiberglass or aluminum layers to make the hull stronger and more resilient.

4

Keel & RIB Fitting

Fit the keels and RIB structure for enhanced stability and impact resistance.

5

Deck Release

Carefully release the deck from the mold and prepare for assembly.

6

Engine Installation

Fit powerful and reliable engines tailored to vessel performance needs.

7

Water Tank Test

Conduct rigorous water tank testing to verify watertight integrity and systems.

8

Sea Trial & Delivery

Final sea trial to validate performance, followed by global shipment.

Our Premium Vessel Range

Grandsea 23 Aluminum Firefighting Boat

23m Aluminum Firefighting Boat

  • Class-approved aluminum construction
  • High-pressure firefighting system
  • Designed for rapid response
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21m Pilot Boat for Rough Seas

21m Pilot Boat – Rough Seas

  • Reinforced hull for extreme conditions
  • High-speed maneuverability
  • Ergonomic crew cabin
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58ft FRP Catamaran Ferry

58ft FRP 74-Pax Catamaran Ferry

  • Stable twin-hull design
  • Capacity: 74 passengers
  • Ideal for lake & river transport
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12m Military Patrol Boat

12m Military Bulletproof Patrol Boat

  • Carbon fiber armored hull
  • High-speed pursuit capable
  • Ballistic protection rated
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22m Aluminum Pilot Boat

22m Class-Approved Aluminum Pilot Boat

  • ABS/DNV certified
  • Fuel-efficient design
  • Seaworthy in heavy seas
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12.45m Coast Guard Patrol Boat

12.45m Aluminum Coast Guard Patrol Boat

  • Outboard engine configuration
  • Armored ballistic rescue version
  • Fast deployment ready
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24m 280-Pax Passenger Ferry

24m 280-Pax Commercial Catamaran Ferry

  • High-capacity transport solution
  • Spacious indoor & outdoor seating
  • Energy-efficient propulsion
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23.8m Luxury Whale Watching Catamaran

23.8m 110-Pax Luxury Whale Watch Catamaran

  • Ice mountain & sightseeing capable
  • Premium interior finishes
  • Observation decks with 360° views
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Recent Global Deliveries

2025-11-17

22m Whale Watching Boat Delivery to Chile

2025-05-08

22m Catamaran Whale Watching Boat – Cutting Plates Ceremony

2025-03-06

22m Catamaran Passenger Ferry Shipped to Papua New Guinea

2025-03-04

10.5m Pleasure Fishing Boat Shipped to Singapore

2025-03-04

3x 23m Passenger Ferry Boats Shipped to Uganda, Africa

2025-03-04

14m Fiberglass Longline Fishing Boat Shipped to Caribbean

Over 300 custom vessels delivered annually to clients across 50+ countries.

Get in Touch with Grandsea Boat

With over 24 years of shipbuilding experience and a professional design team, we’re ready to build your custom vessel. Contact us today for a free quote.

Contact Information

Room 904 #25 Building 669th Huadong Rd, Chengyang, Qingdao, China

+86 532 6773 1845

+86 13206432358 (WhatsApp)

+86 15318716906 (WhatsApp)

+86 15589808698 (WhatsApp)

[email protected]

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