Mega-Guard Dynamic Positioning System

The Mega-Guard Dynamic Positioning System (DP) from Praxis Automation Technology automatically controls a vessel's heading and position by commanding the thrusters using data from position reference systems, gyrocompasses, wind sensors and motion reference units. The Mega-Guard Joystick Control System (JC) is a basic version providing automatic heading and manual positioning.

Models

• JC: joystick control with optional position holding
• DP0: dynamic positioning system
• DP1: DP with independent JC system
• DP2: dual-redundant DP with independent JC system
• DP3: triple-redundant DP with independent JC system

Key features

• Positioning accuracy up to 1 dm with high-accuracy position references (GNSS, laser, radar)
• Parameters tuned before shipment through ship modelling and simulator testing, limiting sea trial tuning to a maximum of three days
• Solid-state hardware with 24 VDC supply throughout, shared with other Mega-Guard products
• Position references: Mega-Guard DGPS, GNSS with Seastar, hydroacoustic (HPR), taut wire (TPR), laser, radar and third-party systems; sensor validation and weighting
• Control modes: Joystick Manual, Joystick Auto Heading, Auto Heading, Auto Position (with minimum power weather-vane and positioning-circle modes, manual surge/sway), Auto Track (low and high speed), Track Follow
• Online wind capability plots at 80% and 100% thrust and with worst-case thruster failure
• Built-in Simulator-Trainer mode meeting Nautical Institute Class C simulator rules
• Language options including Chinese and Japanese

Applications

Offshore supply vessels, cable and pipe laying vessels, ocean salvage vessels, tugs and workboats, multi-purpose vessels, platform crew boats, passenger ferries, jack-up platforms, dredgers, FPSOs, heavy lift vessels, mega yachts and cruise ships, to applicable class and IMO rules (DP1, DP2, DP3). Classification: DNV, BV, LR, GL, ABS, CCS, RS, IRS, NKK.