For more than half a century, stuckeGROUP has been delivering protection and control systems
for ocean-going vessels and offshore platforms. From cargo ships and ferries to drillships,
FPSO units, dive support vessels, and offshore wind installation vessels — our SYMAP®
family of digital relays is in service across all major fleets and operators.
What makes a marine protection relay different from a land-based one is not the algorithms — it is the environment: salt mist, vibration, EMI from large drives, ambient temperatures from -25 °C in arctic operations to +70 °C in engine rooms, the requirement for galvanic isolation, the strict redundancy obligations of class societies, and the simple fact that service can be days away by sea. Every SYMAP® device is engineered to that operating envelope.
Through the stuckeGROUP service network — Hamburg HQ plus offices in Belgrade, Seoul, Shanghai, and Mumbai, coordinated 24/7 from Hamburg — we are a phone call away from any port in the world.
Our SYMAP® devices carry type approvals from the classification societies whose certificates your customers and insurers require. Without these, no shipyard order; with all of them, one device covers any vessel.
Det Norske Veritas
Norway
Bureau Veritas
France
Lloyd’s Register
UK
American Bureau of Shipping
USA
Registro Italiano Navale
Italy
Nippon Kaiji Kyokai
Japan
Russian Maritime Register
Russia
China Classification Society
China
Type approval certificates available on request — contact our sales team
Since 1 July 2024, all new ship contracts under IACS rules must demonstrate cyber resilience for their on-board systems — including protection relays. SYMAP® is type-approved per IACS UR E27 (Rev. 1) by major classification societies including BV, DNV, and LR.
For a shipyard, this means SYMAP® is ready to drop in — no extra cyber-hardening engineering, no waiting for vendor certification, no scrambling to find an approved alternative weeks before delivery.
Marine and offshore industry covers different project types with different priorities. Pick your segment — each page describes the typical challenge, recommended SYMAP® configuration and class society approvals.
Container ships, bulk carriers, tankers, LNG, chemical tankers, general cargo
Typical requirement: Main and auxiliary switchboard protection, parallel operation of multiple diesel gensets, load sharing, automatic load shedding on source loss, class society approvals from LR/ABS/DNV/BV/CCS/PRS/NK/RINA/KR.
Recommended products:
• SYMAP® BCG / ECG — generator protection + PMS
• SYMAP® ARC — MV switchgear arc protection
• SYMAP® R — HIMAP retrofit during docking
Fixed platforms, FPSO/FSO, jack-ups, semi-submersibles, drilling rigs
Typical requirement: High availability in harsh environments, redundant power, bus-tie logic, zoning, class approvals for explosion zones, service in short docking windows.
Recommended products:
• SYMAP® BCG / ECG — PMS and generator protection
• SYMAP® ARC — arc zone protection for MV switchgear
• SYMAP® R — HIMAP obsolescence management
Drillships, AHTS, PSV, cable layers, dive support, accommodation vessels
Typical requirement: Compliance with DP-1, DP-2, DP-3 notations, redundant PMS architecture with physical separation, fast-acting protection, source-loss handling without loss of position.
Recommended products:
• SYMAP® BCG / ECG — redundant PMS with zoning
• SYMAP® ARC — fast arc-flash protection for critical bays
Cruise liners, ferries, ROPAX, RoRo, megayachts, patrol craft, coast guard
Typical requirement: High availability for hotel loads, redundant power for life-safety systems, shore-to-ship power management, IACS UR E27 cyber security, shock resistance (MIL standards).
Recommended products:
• SYMAP® BCG / ECG — redundant PMS
• SYMAP® ARC — MV switchgear protection
Diesel-electric, diesel + battery hybrid, dual-fuel, battery propulsion, SOV, CTV for offshore wind
Typical requirement: Integration of diesel gensets with battery systems through AC/DC converters, peak shaving, spinning reserve reduction, class rules for battery systems. SYMAP® provides a signal and communication interface to the BMS, but is not a BMS replacement.
Recommended products: SYMAP® BCG/ECG for PMS with hybrid sources, SYMAP® Y-BAT for DC battery monitoring side.
SYMAP® solutions deployed on special vessels that do not fit standard categories.
For special applications, send the single-line diagram and requirements list to contact-tender — we propose a configuration.
