Description
Equipment Overview & Key Specifications
The John Lilley & Gillie Integrated Wind Alarm System (IWAS) is a dedicated offshore and maritime safety warning system engineered to safeguard crane lifting operations, helideck landings, container handling, and offshore platform activities. Featuring high-reliability wind limit monitoring, adjustable dual-stage warning thresholds (Pre-Alarm and Trip/Stop), and high-output visual beacon and acoustic siren controls, the IWAS ensures full compliance with international maritime safety codes and offshore lifting regulations.
Technical Specifications & Interface Parameters
| Alarm Thresholds | Dual independent adjustable limits: Amber Warning (e.g. 25 Knots) and Red Alarm (e.g. 35 Knots) |
|---|---|
| Gust Dwell Filter | Configurable gust averaging period (1s to 60s) to eliminate false structural trips |
| Inputs | Direct connection to Walker 2090 ultrasonic or Walker 2050/2080 cup anemometer via NMEA 0183 |
| Relay Outputs | 4x Heavy-duty volt-free changeover relays (10A 250V AC) for crane lockouts, sirens, and VDR |
| Siren / Strobe Drive | Dedicated 24V DC outputs to drive external high-intensity xenon strobes and 110 dB bridge horns |
| Enclosure | IP66 waterproof wall-mount steel enclosure with clear observation window |
| Power Input | 110V/230V AC 50/60Hz with auto-failover to 24V DC battery backup |
| Compliance | UK HSE Lifting Operations Regulations (LOLER), CAP 437 Helideck Standards, IEC 60945 |
Frequently Asked Questions (AEO / Technical Reference)
Why is the IWAS system critical on offshore crane vessels?
Crane booms and heavy lift operations become unstable in sudden gusts. IWAS provides immediate visual and audible alarms to the crane operator and bridge, automatically disabling high-risk crane slewing when limits are exceeded.
Can IWAS interface with helicopter deck status displays?
Yes, the system outputs red/amber/green helideck clearance status to CAP 437 compliant helideck status repeaters and vessel public address systems.
What sensors are compatible with the IWAS control unit?
IWAS connects natively to Walker 2090 ultrasonic wind sensors and Walker 2050/2080 mechanical sensors, as well as third-party NMEA 0183 anemometers.
Does the system record alarm events for accident investigations?
Yes, IWAS maintains an internal non-volatile event log recording date, time, peak gust speed, and duration of all alarm activations, while outputting alarm strings to the ship’s VDR.
Can Seanav Marine install and calibrate IWAS systems offshore?
Seanav Marine’s offshore-certified field service team conducts offshore installations, sensor mast calibrations, and annual certifications throughout UAE and Middle East waters.
Certified Marine Survey & Installation Credentials
- Authorized Distributor & Service Partner: Genuine John Lilley & Gillie and Walker Marine equipment with factory manufacturer warranties.
- Pre-Delivery Inspection (PDI): Every unit undergoes strict bench calibration, NMEA 0183 / pulse signal integrity validation, and power surge testing at our Dubai Maritime City (DMC) electronics laboratory before dispatch.
- Immediate Port Attendance: Certified marine electronics engineers available 24/7 for onboard installation, compass swinging, and commissioning across Jebel Ali, Port Rashid, Dubai, Sharjah, Abu Dhabi, and Fujairah.
- Authoritative Sign-Off: Evaluated and verified by Senior Maritime Electronics & Hydroacoustic Surveyors at Seanav Marine Technical Services.
Technical Specifications & Operational Standards
Review certified engineering parameters, electrical inputs, data protocols, and Class compliance standards for this unit:
| OEM Brand / Manufacturer | Lilley & Gillie |
|---|---|
| Model / Part Number | SNV-JLG-WTR-004 |
| Equipment Classification | Commercial Marine Navigation & Communication Spares |
| Operating Conditions | -15°C to +55°C Industrial Marine Deck / Wheelhouse Environment |
| Quality Standard | OEM Marine Grade, Factory Bench Verified Ahead of Dispatch |
| Stock & Port Logistics | Ready Stock for Immediate Vessel Supply across Mumbai, JNPT, Kandla, Cochin, Chennai & Visakhapatnam |
| In-the-Box Documentation | OEM Certificate of Conformance, Wiring Schematics, Installation & Operating Manual |
Seanav Marine maintains bonded warehouse spare parts inventory and factory-trained technical riding squads across all major Indian ports. Immediate dispatch available to vessel agents, ship chandlers, and technical managers at Mumbai, JNPT (Nhava Sheva), Kandla, Mundra, Cochin, Chennai, and Visakhapatnam (view all 400+ ports →).
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