Liya Boat-RIB Boat Manufacturer Liya Boats Work RHIB-Rescue & Patrol RIBs 27Ft Aluminum Patrol Boat Polyurea-EVA Collar Deep-V Hull

27ft aluminum patrol boat front view with polyurea EVA foam collar

Rear view twin 225 hp outboard aluminum patrol boat

Polyurea covered EVA foam collar detail for buoyancy and impact protection

Aluminum deck and console layout of marine grade patrol craft

27Ft Aluminum Patrol Boat Polyurea-EVA Collar Deep-V Hull

Professional-grade vessel engineered for demanding marine
operations.
➤Built with a fully welded aluminum hull and aluminum skeleton, this boat delivers exceptional durability in the toughest environments.
➤What sets it apart is the polyurea spray-coated EVA foam collar that runs around the entire gunwale—providing both additional buoyancy and superior impact resistance against docks, debris, and beaching landings.
➤The 23° deep V aluminum hull cuts through waves efficiently, reducing pounding and ensuring a smooth, dry ride.
➤Whether you need a search and rescue aluminum boat, a beach landing support craft, or a rugged commercial work boat for transport and logistics, the 27ft aluminum hull vessel is built to perform.
➤With twin 225HP outboard engines (estimated 236kg each) and a 450-liter fuel tank, this polyurea foam collar workboat is ready for extended missions.

Model：
HY830-Alu
Brand：
Liya Boat
Code：
8903.190000
Capacity：
10 people
Engine shaft：
XL 25''
Recommended power：
225 HP*2
Max power：
250 HP*2

库存： 0

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▍Built for Professional Maritime Missions

▍27 foot all aluminum hull patrol vessel with polyurea-coated foam collar

This 27 foot all aluminum hull patrol vessel is specifically designed for

✦ Waterborne patrol and maritime security

✦ Search and rescue (SAR) operations

✦ Beach area logistical support and personnel transfer

✦ Patrol interdiction

✦ Shallow water deployment and coastal defense

27ft patrol work boat with Exposed aluminum skeleton frame showing structural skeleton

27ft aluminum boat landing on beach with foam collar absorbing impact

The combination of an aluminum bottom and polyurea‑coated solid EVA foam collar makes this vessel truly multi‑mission capable. The rigid foam collar provides

▶Permanent buoyancy even if the outer skin is compromised

▶Impact absorption for pier landings and beaching

▶Zero maintenance compared to inflatable Hypalon or PVC tubes

▶High resistance to UV, saltwater, and abrasion

27ft professional grade aluminum mission boat with Polyurea covered solid EVA foam collar cross section absorbing impact

27ft marine grade patrol aluminum boat cutaway section showing closed-cell EVA foam core and polyurea coating

Deep‑V Aluminum Hull Design for Superior Seakeeping

≈ With a 23° deep‑V hull, this deep V aluminum patrol boat for rescue delivers exceptional wave‑cutting capability.

≈ The deeper V‑shape angle significantly reduces slamming and vertical acceleration, allowing higher transit speeds in rough sea states without compromising crew safety.

≈ This design is proven for planing hulls operating in offshore environments — the deep‑V cuts through waves to reduce pounding, a critical requirement for patrol and rescue missions.

Deep V aluminum hull bottom showing 23 degree deadrise angle for wave cutting

▍27.2ft All‑Aluminum Patrol Boat–Technical Specifications

Dimensions

Model	HY830-Alu
Length overall	8.30m / 27.2ft
Width overall	2.86m / 9.38ft
Main housing thickness	7.95m / 26.08ft
Inside width	2.16m / 7.09ft
Waterline length	7.54m / 24.74ft
Design waterline	0.50m / 1.64ft
Deck length	5.60m / 18.37ft
The above data may have slight errors due to variations in the degree of inflation.
V‑shape degree	23°
Category	C, B

Capacity

Capacity	10 person
Max loading	1200kg
Net weight	2380kg
Full load displacement	3600kg
Note:The net weight means boat with console,seat, etc ,empty feul tank,no engine. The net wight also may change slightly depending on the different console, seat or other configuration etc

Outboard Engine

Engine shaft	XL 25″
Recommended power	225HP ×2 (about 265kg ×2)
Max recommended power	250HP ×2 (about 265kg ×2)
Fuel tank	450 Liter
If install the maximum horsepower engine, please confirm with factory before produce, it's very important

Shipment

40FT HQ container	2pcs
Note:The solid D-type fender can be removed for transport; a 40-foot high cube container can fit two ships.If solid fenders need to be installed and secured before shipment, then "frame transport" is required.

Buyer-Centric FAQ:

Q1: Can this aluminum patrol boat handle beach landings and rocky shore operations?

Yes. The combination of an all-aluminum bottom and the impact-absorbing polyurea foam collar makes this vessel exceptionally suited for beach landings, shallow water operations, and working around rocky or abrasive shorelines. The aluminum hull resists impact damage far better than fiberglass, while the foam collar acts as a protective bumper.

Q2: What makes the polyurea-EVA foam collar different from standard inflatable collars?
Unlike Hypalon or PVC inflatable tubes that require periodic inflation, pressure checks, and are vulnerable to punctures, our polyurea-coated solid EVA foam collar is punctureproof, requires zero maintenance, and provides permanent buoyancy. Even if the outer polyurea coating is damaged, the closedcell EVA foam core does not absorb water and retains full flotation capacity.

Q3: Can the engine configuration be changed from twin 225HP to something else?
Yes. While twin 225HP is the recommended configuration for optimal performance, the transom can accommodate single or twin engines up to a combined maximum of 500HP. Contact our technical team to discuss alternative powertrain options.

Q4: How many people can this boat carry safely?
The vessel is certified for 10 persons under full operational loading. Maximum total load (persons + equipment + fuel) is 1200kg.

Q5: Is training or documentation provided?
Yes. Every vessel ships with a complete owner’s manual, maintenance schedule, engine documentation.Remote commissioning support is available.

▍27Foot Aluminum Patrol Boat – Operation & Maintenance Guide

Proper operation and regular maintenance are essential to maximize the service life and performance of your aluminum patrol boat with polyurea EVA foam fendering system. Follow this comprehensive guide to keep your vessel in peak operating condition.

Section 1 – First-Time Use

√ Read the engine manufacturer's manual thoroughly before starting any outboard motor on this aluminum patrol hull.

√ The performance and service life of your twin 225HP outboard engines depend entirely on correct usage and scheduled maintenance.

√ Ensure all operators understand the vessel's handling characteristics—especially the 23° deep-V aluminum hull response in following seas and beam waves.

√ Verify all crew members know the location and operation of safety equipment (life jackets, fire extinguishers), emergency cut-off switch, and VHF radio.

Section 2 – Pre-Start Checklist (Every Operation)

Before launching your 27Foot aluminum patrol boat for any mission—patrol, search and rescue, or beach landing—complete this checklist:

Item	Action
Fuel system inspection	Check for fuel leaks at tank, hoses, and primer bulb
Water ingress check	Inspect bilge compartments and hull interior for any leakage
Engine oil level	Verify correct oil level on both 225HP outboards
Fuel quantity	Confirm sufficient fuel for planned voyage plus reserve (450L tank capacity)
Battery voltage	Check terminals for corrosion and tightness; verify charge
Fender system inspection	Examine polyurea-sprayed EVA foam fender for any visible damage or delamination
Propeller clearance	Ensure propellers are free of fishing line, debris, or marine growth
Crew briefing	Review emergency procedures, man overboard recovery, and helm responsibilities

Section 3 – Break-In Period (First 20 Operating Hours)

For new twin outboard engines on this aluminum patrol vessel :

√ Avoid sustained full-throttle operation during break-in period.

√ Oil consumption may be higher during initial hours—check oil levels frequently.

√ Limit engine RPM to approximately 300–400 RPM below maximum rated range.

√ Vary engine speed every 10–15 minutes to promote proper ring seating.

√ After break-in, perform first scheduled service as specified by engine manufacturer.

Section 4 – Normal Cruising & RPM Recommendations

√ Optimal cruise range: 300–600 RPM below maximum rated RPM for fuel efficiency and engine longevity.

√ The deep-V aluminum hull achieves its best efficiency and ride comfort when trimmed properly for sea conditions.

√ Hull fouling awareness: In waters with high marine growth (algae, barnacles), expect speed loss of 2–4 knots after one month of continuous operation without bottom cleaning.

√ Keep hull bottom clean—marine growth on the aluminum hull increases drag, reduces fuel economy, and strains engines.

Section 5 – Engine Shutdown Procedure

Shift control lever to neutral position
Allow engines to idle for 1–2 minutes to cool turbochargers (if equipped) and stabilize temperatures
Turn ignition keys to OFF position to stop engines
Close main battery disconnect switch to prevent parasitic drain
Inspect bilge for any water accumulation or fluid leaks
If beaching your aluminum landing craft , secure bow line and verify fender system contact before exiting vessel

Section 6 – Severe Weather & Rough Sea Operation

The 27FT aluminum patrol boat with 23° deep-V hull is designed for offshore conditions but demands respect for the sea:

√ File a float plan before any offshore voyage—departure time, destination, and estimated return

√ Never operate beyond your skill level or the vessel‘s certified conditions (CE Category B)

√ Avoid running parallel to large swells – quartering seas provide better control

√ Adjust speed to sea conditions; slower is safer when wave periods are short

√ Crew must remain seated or secured; all loose gear must be stowed

√ Keep life jackets accessible—do not stow them below deck

Section 7 – Periodic Maintenance Definition

Maintenance intervals are based on actual usage patterns :

Usage Intensity	Recommended Interval
Summer use only (weekend boating)	Annually
Continuous daily operation (commercial/military)	Weekly or every 50 hours

Baseline recommendation: Every 50 hours or 6 months (whichever occurs first) for professional users of this aluminum patrol vessel.

Section 8 – Daily Maintenance Tasks (Pre-Start)

Task	Frequency
Check engine oil level (both 225HP outboards)	Each start
Inspect cooling water intake and tell-tale	Each start
Check bilge for leaks or loose components	Each start
Inspect control mechanisms – shift and throttle cables	Daily
Inspect battery terminals for corrosion or looseness	Daily
Check voltage; recharge if low	As needed
Lubricate steering and control linkages with marine-grade grease	Daily
Spray engine and mechanical components with anti-corrosion lubricant	Daily in saltwater use
Remove marine growth from propellers and lower units	As needed

Section 9 – Fuel System Maintenance

√ Periodically inspect fuel lines, tank fittings, and water-separating fuel filters for damage or corrosion

√ Replace fuel filters at manufacturer-recommended intervals (typically 100–200 hours)

√ Any compromised fuel system component must be replaced immediately with marine-grade parts

Section 10 – Out-of-Water Maintenance & Hull Care

Proper lifting procedure for this aluminum landing craft :

◆ Use lifting slings with adequate safe working load rating and sufficient length

◆ Place soft padding between slings and the polyurea fender system to prevent abrasion

◆ Ensure vessel is balanced before lifting

◆ Never lift with single-point attachments unless specifically designed for such use

Hull bottom cleaning:

◆ Best practice: Clean immediately after haul-out while bottom is still wet—dried marine growth is significantly harder to remove

◆ Procedure:

Pre-rinse with seawater and mild detergent mixture to remove salt deposits
Rinse thoroughly with fresh water
For stainless steel and aluminum hardware, apply protective coating as specified

Anti-fouling treatment:

Apply epoxy primer coat (moisture barrier) to submerged portion of aluminum hull
Apply high-quality anti-fouling paint over primer to prevent biofouling growth
Regular cleaning and reapplication of anti-fouling is essential—neglect will cause speed degradation
Do not damage the epoxy primer layer during cleaning; it protects the aluminum from galvanic corrosion

Section 11 – Corrosion Prevention (Critical for Aluminum Boats)

The marine-grade aluminum hull requires proper corrosion management:

√ Sacrificial anodes (zinc/aluminum): Check regularly; replace when 50% consumed

√ Electrical bonding: Ensure all metal components are properly bonded to prevent stray current corrosion

√ Never use copper-based anti-fouling paints on aluminum—they cause galvanic corrosion

√ Rinse polyurea foam fender with fresh water after each use in saltwater

√ The polyurea coating provides excellent corrosion protection to the underlying structure when intact.

Section 12 – Polyurea EVA Foam Fender Maintenance

The solid foam fender system is designed for minimal maintenance:

√ Inspect polyurea coating periodically for cuts, abrasion, or peeling

√ Small surface damage can be repaired with polyurea patch kits

√ The closed-cell EVA foam core remains buoyant even if the outer skin is breached—the vessel will not sink

√ Clean with mild soap and fresh water; avoid high-pressure washers directed at seams

Section 13 – Storage & Winterization (If Applicable)

√ Store with hull properly supported—never rest on foam fenders alone

√ If storing for extended periods, perform full engine winterization per manufacturer guidelines

√ Cover the polyurea fender to protect from extended UV exposure (although UV-stabilized, covers extend service life)

√ Disconnect batteries and maintain with trickle charger if available

Section 14 – Warranty & Professional Servicing

√ Engine and critical systems should be serviced by certified technicians

√ Improper maintenance or use of incorrect lubricants can void warranties

√ Keep a maintenance log documenting all service performed—this protects warranty claims and resale value

√ The aluminum hull and polyurea fender system are covered by manufacturer warranty; contact us for specific terms based on your operational profile