Complete Marine Maintenance, Service & Repair Departments
Seanav Marine operates dedicated mobile technical squads and workshop facilities from Dubai Maritime City, delivering 24/7 technical boarding, riding squads, workshop overhauls, statutory inspections, and emergency repairs across all 28 specialized marine maintenance departments.
📢 Statutory & Class Approval: Our partnered companies are authorised with all major class to carry our Radio GMDSS SRT Survey onboard vessel. Covering all 12 IACS member societies and recognized Non-IACS registers worldwide.
Explore the 5 Marine Engineering Divisions:
Division 1: Navigation, Communication & Shipboard IT
Bridge electronics, satellite connectivity, digital charts, and maritime cybersecurity.
01. Marine NavCom
Core Bridge
Full bridge navigation and radio communication electronics maintenance and repairs:
- Radar & ARPA (magnetron replacement, tuning, display repair)
- Gyrocompass (overhaul, sphere renewal, fluid change, calibration)
- Autopilot & steering control systems
- ECDIS (hardware, display monitors, operating system repair)
- Integrated Bridge Systems (IBS), speed log & echo sounder
- GMDSS consoles, VHF / MF / HF radios & DSC controllers
- EPIRB, SART & AIS Class A transponders
- VDR & S-VDR Annual Performance Tests (APT)
11. Charts & Publications
Nautical
Official electronic navigational charts, licensing, and statutory publications:
- Electronic Navigational Charts (ENC) & AVCS chart permits
- ECDIS chart management & S-57 / S-63 data updates
- Admiralty Digital Publications (ADP, AENP)
- Paper nautical charts, block corrections & Notices to Mariners
- Mandatory IMO, SOLAS, MARPOL, and STCW publication libraries
- Flag-State specific maritime circulars and official logbooks
12. Airtime & Satellite Comms
Connectivity
High-speed offshore internet, satellite airtime, and antenna systems:
- Starlink Maritime high-speed antenna supply, mounting & integration
- Marine VSAT, Inmarsat Fleet Xpress & FleetBroadband systems
- Above Deck Units (ADU), BDU, BUC, and LNB servicing
- Antenna tracking calibration, gyro stabilization, and azimuth tuning
- TVRO satellite entertainment distribution systems
- Global satellite SIM provisioning, VoIP, and bandwidth management
28. Shipboard IT & Cybersecurity
Network & Security
Vessel IT infrastructure, OT/IT network segmentation, and IMO cyber compliance:
- Compliance with IMO MSC.428(98) and IACS UR E26 / E27 requirements
- Industrial network switches, marine routers, and hardware firewalls
- OT (Bridge/Engine) vs. IT (Crew/Business) VLAN segmentation
- Captive portal onboard Wi-Fi systems and bandwidth allocation
- Endpoint security, automated server backups, and disaster recovery
Division 2: Automation, Electrical & Control Systems
Engine room automation, power distribution, switchboards, and sensor calibrations.
02. Automation & Control
IAS / PMS
Marine integrated automation systems, monitoring, and control loops:
- Alarm, Monitoring & Control Systems (AMCS / AMS)
- PLC systems (Siemens S7, Schneider, Omron, Mitsubishi, WAGO)
- Analog & digital I/O module fault diagnostics and replacements
- Power Management Systems (PMS): auto-sync, load sharing, blackout recovery
- Electronic and hydraulic governors & actuator linkages
- Remote Valve Operating Systems (RVOS) & Hydraulic Power Units (HPU)
13. Electrical Systems
Power
Marine power generation, switchgear, distribution, and protection:
- Main Switchboard (MSB) & Emergency Switchboard (ESB) servicing
- Air Circuit Breakers (ACB) and HV vacuum breaker secondary injection testing
- Generator alternators, automatic voltage regulators (AVR), and insulation tests
- Motor Control Centers (MCC), starters, and soft starter overhauls
- Class-approved marine battery banks, chargers, and UPS emergency systems
- Shore connection panels and earth fault troubleshooting
26. Calibration & Testing
Instrumentation
Traceable precision instrument calibration and statutory verification:
- Pressure calibrators, deadweight testers, and temperature dry-wells
- Portable & fixed gas detectors (O₂, LEL, H₂S, CO) calibration with span gases
- Shaft power and optical torque monitoring system recalibration
- Magnetic compass calibration & deviation card issuance by licensed adjusters
- Overload relays, reverse-power, and generator safety trip testing
Division 3: Safety, LSA, FFA & Statutory Compliance
SOLAS life-saving appliances, firefighting systems, and IACS class inspections.
03. LSA — Life-Saving Appliances
SOLAS
Annual and 5-year statutory inspection, testing, and recertification:
- Lifeboats & rescue boats: hull, engine, release gear & load tests
- Davit winches, wire ropes, brake pads, and dynamic overload testing
- Inflatable liferaft servicing and hydrostatic release unit (HRU) checks
- Immersion suits, lifejackets, and personal transfer baskets
- SCBA and EEBD breathing apparatus pressure testing and air refilling
04. FFA — Fire-Fighting Appliances
Fire Safety
Fixed extinguishing systems, portable units, and detection loops:
- Fixed high-pressure CO₂ systems (cylinder weighing, manifold hydrostatic tests)
- High-expansion and low-expansion foam systems & annual foam analysis
- Water mist, deep-fat fryer, and paint locker fire suppression systems
- Portable & semi-portable extinguishers (dry powder, foam, CO₂, wet chemical)
- Addressable fire alarm panels, smoke, heat, and flame detector loops
25. Class & Statutory Support
IACS & Flag
Annual, intermediate, and special survey attendance & pre-audits:
- GMDSS Radio Surveys (SRT): Authorized partner support for all 12 IACS societies
- Safety Equipment (SEQ) & Safety Radio certificates pre-survey health checks
- Transfer of Class (PR1A) & Non-IACS conversion (PR1C) compliance surveys
- Port State Control (PSC) deficiency rectification & flag state clearances
Division 4: Propulsion, Engines & Mechanical Systems
Workshop and afloat heavy mechanical maintenance, overhauls, alignment, and machining.
05. Marine Main Engines
Heavy 2-stroke and 4-stroke propulsion engine riding squads and workshop overhauls:
- Major & top-end overhauls, decarbonization, cylinder head reconditioning
- Piston extraction, ring groove re-machining, and crown cleaning
- Cylinder liner internal diameter calibration, wave-cut honing, and ridge removal
- Crosshead, crankpin, and main bearing inspection & clearances
- Crankshaft web deflection measurements and alignment analysis
06. Auxiliary Engines / DGs
Shipboard diesel generator mechanical and electrical scheduled overhauls:
- Top-end (8,000h) and major (16,000h / 24,000h) generator engine overhauls
- Cylinder head pressure testing, valve seat grinding, and valve guide replacement
- Piston connecting rod alignment, bush replacement, and big-end bearings
- Makers: Yanmar, Daihatsu, MAN B&W, Wärtsilä, Caterpillar, Bergen
07. Turbochargers
Complete overhaul, dynamic balancing, and cartridge refurbishment:
- Rotor dynamic balancing, shaft crack detection, and runout inspection
- Floating and journal bearing renewals, labyrinth seal replacements
- Nozzle ring cleaning, turbine blade bead blasting, compressor wheel profiling
- ABB (VTR, TPL, TPS), MAN (TCA, TCR), and Mitsubishi (MET) support
08. Fuel Oil Systems
High-pressure injection equipment, fuel conditioning, and purifiers:
- High-pressure fuel injection pump overhaul, plunger/barrel lapping
- Fuel valve & injector testing (opening pressure, atomization spray pattern)
- Fuel timing calibration, VIT adjustments, and electronic ME-C lubricators
- Heavy fuel oil (HFO) pre-heaters, viscometers, and booster modules
09. Lubrication & Cooling
Plate heat exchangers, descaling, LO purifiers, and cooling loops:
- Plate heat exchanger (Alfa Laval, Sondex, GEA) re-gasketing & chemical descaling
- Central cooling water pumps, jacket water heaters, and thermostatic valves
- LO purifier bowl dismantling, balancing, and disc stack chemical cleaning
10. Shaft Line & Propulsion
Tailshaft, stern tube seals, propeller, and intermediate shafting:
- Stern tube seal bonding, liner chrome-plating, and Simplex seal overhauls
- Propeller blade polishing, cavitation repair, and pitch mechanism checks
- Intermediate shaft bearings, thrust bearing inspection, and optical laser alignment
- Controllable Pitch Propeller (CPP) OD box overhaul and hydraulic distribution
14. Pumps & Auxiliary Machinery
Centrifugal, positive displacement, screw, and gear pump overhauls:
- Main bilge, ballast, general service, fire, and GS pump mechanical overhauls
- Shaft line dynamic balancing, wear ring re-machining, and bearing fitting
- Mechanical seal replacements, gland packing renewals, and alignment
- Makers: Taiko Kikai, Shinko, Teikoku, Desmi, Allweiler, Iron Pump
15. Valves & Piping
Marine valve overhaul, seat lapping, pressure testing, and pipe spooling:
- Sea chest valves, storm valves, overboard discharges, and ballast valves
- Hydraulic and pneumatic remote-operated valve (ROV) actuator rebuilding
- Safety relief valve calibration, bench testing, and class stamping
- Prefabrication of galvanized, CuNiFe, and carbon steel pipe spools
23. Deck Machinery
Windlasses, mooring winches, cargo cranes, and hatch covers:
- Anchor windlass brake lining relining, dog clutch & gypsy gear overhauls
- Mooring winch hydraulic motor, planetary reduction gearbox, and spooling gear
- Provision crane and cargo crane hydraulic cylinder repacking & wire renewals
- Hatch cover hydraulic cylinders, cleating wedges, and rubber packing
24. Hull & Mechanical Repair
Afloat steel renewal, certified welding fabrication, and structural repairs:
- Class-certified hull steel crop and renewal in cargo holds and ballast tanks
- Watertight door dogs, quick-acting cleats, and rubber gasket replacements
- Manhole cover machining, fairlead roller rebuilding, and bollard reinforcements
- Under-water and afloat temporary/permanent insert welding repairs
Division 5: Auxiliary, Environmental & Hotel Systems
Boilers, water generation, environmental MARPOL equipment, HVAC, and cargo controls.
16. Boiler & Steam Systems
Auxiliary and exhaust-gas economizers, burners, and combustion management:
- Burner Management Systems (BMS) logic testing and flame scanner alignment
- Fuel modulation valves, atomizing steam control, and ignition electrodes
- Feedwater pumps, level gauge glasses, and cascade tank controls
- Boiler tube inspection, plug fittings, and hydrostatic pressure testing
17. Incinerator Systems
Marine waste oil and garbage incinerator plant servicing & refractory:
- Primary & secondary burner servicing, nozzle renewals, and flame safeguards
- Refractory brick relining, high-temp castable repairs, and door insulation
- Combustion chamber pressure draft transmitters and flue gas fan overhauls
18. Fresh Water Generator (FWG)
Vacuum distillation and reverse osmosis marine potable water makers:
- Evaporator and condenser plate pack chemical cleaning and descaling
- Air and brine ejector nozzle machining, vacuum leak testing
- Distillate water pump mechanical seals and salinity sensor calibration
- Alfa Laval (Nirex), Sondex, and Sasakura fresh water generators
19. OWS & Environmental Systems
MARPOL Annex I pollution prevention compliance equipment:
- 15 ppm bilge alarm calibration, certificate issuance & cell cleaning
- Oily Water Separator coalescer filter bed and oil discharge automation
- Oil Discharge Monitoring Equipment (ODME) for tankers
- Automatic stopping devices and 3-way discharge diversion valve testing
20. Ballast Water Management (BWTS)
D-2 standard ballast water treatment plant commissioning and maintenance:
- Automatic self-cleaning backwash screen and candle filter overhauls
- UV lamp, wiper motor, quartz sleeve, and ballast sensor replacements
- Electrolysis / electro-chlorination cell and Total Residual Oxidant (TRO) calibration
- Commissioning biological testing assistance and class survey verification
21. Cargo & Tank Systems
Tanker and gas carrier cargo pumping, monitoring, and manifold systems:
- Submerged deep-well cargo pump (Framo-type) hydraulic motor and seal repairs
- Radar tank gauging, electro-pneumatic level transmitters, and high-level alarms
- Vapor recovery, cargo manifold pressure sensors, and temperature probes
- Inert Gas Systems (IGS) oxygen analyzers and scrubber seal valves
22. Refrigeration & HVAC
Provision store refrigeration, cargo chilling, and accommodation AC plants:
- Marine compressor overhauls (Carrier, Bitzer, Sabroe, Daikin, Bock)
- Water chillers, AHU fan motor balancing, and expansion valve calibration
- Refrigerant leak detection, recovery, and ecological charging
27. Spare Parts & Technical Supply
OEM ship spares, reconditioned exchange units, and rapid launch delivery:
- Main & auxiliary engine liners, pistons, injectors, and turbocharger rotors
- Reconditioned gyro elements, radar magnetrons, and automation PLCs
- 24/7 harbor launch delivery to Dubai, Fujairah, Suez, and global ports
Complete Marine Equipment, Systems & Service Index
Seanav Marine maintains specialized tooling, genuine spares procurement, and authorized riding engineers for every critical system onboard commercial vessels, tankers, bulkers, container ships, and offshore units.
Navigation & Bridge Equipment
Dept 01
- Navigation & Bridge Equipment (Integrated Bridge Systems – IBS)
- GMDSS & Radio Communication (MF/HF, VHF DSC, Inmarsat-C, NBDP)
- ECDIS & Digital Navigation (Dual ECDIS setups, sensor integration)
- VDR / S-VDR (Annual Performance Testing – APT, capsule retrieval)
- Gyrocompass & Autopilot (Sphere overhauls, adaptive steering)
- Radar & ARPA (X-band, S-band, magnetron replacement & tuning)
- Echo Sounder & Speed Log (Transducer & gate valve attendance)
- AIS (Automatic Identification System Class A transponders)
- BNWAS (Bridge Navigational Watch Alarm System sensors & resets)
- GPS / GNSS (Differential GPS receivers & heading sensors)
- Weather / Meteorological Equipment (Anemometers, barometers, fax)
- Magnetic Compass (Binnacle servicing, Flinders bars & spheres)
- Signal & Navigation Lights (Lantern controllers & Aldis lamps)
Automation & Control Systems
Dept 02
- Automation & Control Systems (Integrated Automation – IAS)
- PLC / SCADA (Siemens, Schneider, Omron, WAGO logic debug)
- Alarm & Monitoring Systems (AMS / AMCS / ERAMS)
- Power Management Systems (PMS) (Sync, load sharing, blackout)
- Engine Automation (Remote control, slow turning, shutdown logic)
- Cargo Automation (Cargo monitoring, manifold control consoles)
- Tank Gauging (Radar, electro-pneumatic, hydrostatic transmitters)
- Valve Remote Control Systems (VRCS) (Hydraulic / pneumatic)
- Pneumatic & Hydraulic Systems (Actuators, solenoid banks, HPUs)
- Boiler Automation (Burner modulation, flame scanners, level alarms)
- Incinerator Automation (Chamber temp control, sludge dosing logic)
- Governors (Woodward, Nabtesco, Europa hydraulic & electronic)
Propulsion & Heavy Machinery
Depts 05-10
- Main Engines (2-stroke & 4-stroke MAN B&W, WinGD, Sulzer, Wärtsilä)
- Engine Overhauling (Cylinder heads, pistons, liners, bearings)
- Auxiliary Engines / Generators (Yanmar, Daihatsu, Caterpillar, Bergen)
- Turbochargers (Rotor dynamic balancing, bearings, nozzle rings)
- Fuel Injection Equipment (Pumps, injectors, lapping, calibration)
- Shaft Line & Propulsion (Tailshaft withdrawal, laser alignment)
- Propellers (Blade polishing, pitch mechanism overhauls, repairs)
- Stern Tube Systems (Simplex seals, white-metal bearings, chrome liners)
- Pumps (Centrifugal, screw, gear, ballast, bilge, boiler feed)
- Compressors (Main starting air, working air, control air)
- Purifiers / Separators (Alfa Laval, Westfalia, Mitsubishi bowls)
- Engine Spare Parts (Liners, rings, valves, bearings, gaskets)
Auxiliary, HVAC & Environmental
Depts 09, 16-22
- Heat Exchangers (Plate coolers, shell & tube, ultrasonic descaling)
- Fresh Water Generators (FWG) (Plate distillation, Reverse Osmosis)
- Boilers (Auxiliary steam boilers, exhaust gas economizers)
- Incinerators (Burner tuning, refractory brick relining, chambers)
- Refrigeration & HVAC (Provision plants, AC chillers, AHU overhauls)
- Ballast Water Management Systems (BWTS) (UV / filtration, TRO)
- OWS / 15-ppm Systems (Coalescers, bilge alarms, ODME)
- Tank Cleaning & Sludge Services (Sludge transfer, desludging)
Electrical Systems & Power
Dept 13
- Electrical Systems (Surveys, thermal imaging, earth fault tracking)
- Generators & Alternators (Rewinding, AVR calibration, diode tests)
- Switchboards (Main MSB, Emergency ESB, ACB injection testing)
- HV Systems (High-voltage switchgear, vacuum contactors, safety interlocks)
- Transformers (Marine step-down, lighting & distribution transformers)
- Motors & Starters (DOL, star-delta, soft starters, VFD drives)
- UPS & Battery Systems (Emergency radio batteries, float chargers)
- Emergency Power Systems (Blackout auto-start emergency generators)
Deck Machinery & Structural
Depts 15, 23-24
- Deck Machinery (Mooring equipment, winches, fairleads, bollards)
- Anchor Windlasses (Brake relining, gypsy gear, clutches, hydraulic motors)
- Mooring Winches & Capstans (Brake holding tests, tension controls)
- Deck Cranes (Provision, hose, cargo cranes, wire rope renewals)
- Hatch Covers (Hydraulic cylinders, rubber seals, cross-joint cleats)
- Hydraulic Power Packs (Proportional valves, pump overhauls, flushing)
- Ship Repair & Steel Repairs (Afloat hull inserts, double bottom renewals)
- Pipe Fabrication & Repair (Spool prefabrication, CuNiFe, ERW, seamless)
- Welding & Machining (Class-certified 6G welders, portable line boring)
Safety, LSA & FFA
Depts 03 & 04
- LSA — Life-Saving Appliances (SOLAS annual / 5-year certifications)
- Lifeboats & Rescue Boats (Engine overhauls, hull GRP, water bag tests)
- Liferafts (Servicing, annual inflation tests, HRU renewals)
- Davits & Release Gear (On-load / off-load release hooks, dynamic load tests)
- Immersion Suits & Lifejackets (Pressure tests, lights, whistles)
- SCBA / EEBD (Hydrostatic cylinder tests, breathing air refilling)
- FFA — Fire-Fighting Appliances (Complete shipboard fire safety gear)
- Fire Extinguishers (Dry powder, CO₂, foam, wet chemical recharges)
- Fire Pumps & Emergency Fire Pumps (Discharge pressure, suction checks)
- Fire Hydrants & Hoses (Couplings, nozzle spray/jet, pressure tests)
- Fixed CO₂ Systems (Cylinder ultrasonic weighing, manifold lines)
- Foam Systems & Water-Mist Systems (High/low expansion, nozzle tests)
- Fire Detection & Alarm Systems (Smoke, heat, flame detectors, control panel)
- Gas Detection (Portable multi-gas monitors, fixed pump room systems)
- Emergency Equipment (Safety harnesses, embarkation ladders, stretcher)
Nautical Data, Satcom & Cyber
Depts 11, 12, 28
- Charts & ENC / AVCS (Admiralty Vector Chart Service permits & updates)
- Admiralty Publications (ADP, AENP, List of Lights, Radio Signals)
- IMO / SOLAS / MARPOL Publications (Latest mandatory amendments)
- Satellite / Airtime / VSAT (Starlink Maritime, Inmarsat, Fleet Xpress)
- Cybersecurity & Shipboard IT (IMO MSC.428(98), IACS UR E26/E27)
- Network Infrastructure & Operational Network (VLAN bridge/engine/crew)
- Crew Wi-Fi & Captive Portals (Bandwidth management, vouchers)
- Firewall / Security & Antivirus (Hardware UTM appliances, hardening)
- Server & Computer Systems (Industrial marine PCs, bridge display units)
- Software / Firmware Updates (ECDIS OS, radar software, firmware patches)
- Telemedicine / Crew Welfare Connectivity (Remote health link, VoIP)
Testing, NDT & Diagnostics
Dept 26
- Calibration & Instrumentation (NIST/UKAS traceable certifications)
- Pressure / Temperature / Flow / Level Instruments (Transmitters, gauges)
- Electrical Testing (Insulation resistance, ACB secondary injection, thermal)
- Safety Equipment Testing (Relief valves, alarms, emergency shutdowns)
- Condition Monitoring & Predictive Maintenance (Scheduled asset health)
- Vibration Analysis (Rotating machinery, turbines, motors, bearing health)
- Thermography (Infrared scanning of MSB, electrical cabinets, lagging)
- Oil Analysis (Lube oil viscosity, flash point, water content, wear metals)
- Ultrasonic Testing (UTM) & NDT (Hull plate thickness, weld inspection)
Surveys, Drydock & Service Modes
Depts 24 & 25
- Class Survey Support (All 12 IACS societies + authorized Non-IACS registers)
- Flag-State & Port-State Inspection Support (PSC deficiency closure)
- Annual / Intermediate / Special Survey Support (5-year cycle attendances)
- Drydock Services & Afloat Ship Repair (Supervision, riding squads, docking)
- Mechanical, Electrical, Automation & Electronics Repairs (Full spectrum)
- Riding Squad / Service Engineers (Global sea voyages, drydocks, anchorages)
- Onboard Troubleshooting & Remote Support (24/7 technical assistance)
- Installation, Commissioning, Testing & Commissioning (Turnkey delivery)
- Annual Maintenance Contracts (AMC) (Preventive & corrective maintenance)
- Technical Management Support & Certification (Class/flag documentation)
Procurement, Stores & Chandlery
Dept 27
- OEM Spare Parts & Non-OEM / Equivalent Spares (Genuine & high-grade)
- Consumables & Emergency Spare Delivery (24/7 port launch delivery)
- Marine Procurement & Technical Stores Supply (IMPA / ISSA catalogue)
- Ship Chandlery (Deck, engine, electrical, safety, cabin stores)
- Safety Stores & PPE (Coveralls, helmets, safety boots, gas meters)
- Electrical Stores (Marine cables, circuit breakers, relays, fuses, lamps)
- Engine Stores (Filters, lubricants, mechanical packings, joint sheets)
- Navigation Stores (Nautical instruments, flags, log sheets, plotting tools)
- Deck Stores (Mooring lines, wires, shackles, paint, pneumatic tools)
Underwater, Diving & Husbandry
Husbandry
- ROV / Underwater Inspection (CCTV live video feeds, sea chest grates)
- Diving Services & Underwater Hull Inspection (IACS-approved UWILD)
- Propeller Inspection & Hull Cleaning (Hydraulic brush karts, polishing)
- Tank Cleaning & Sludge / Waste Services (Slops disposal, gas-free certs)
- Bunkering Support & Fresh Water Supply (Offshore barge / launch delivery)
- Launch / Boat Services (Crew change, technician boarding, stores delivery)
- Port Agency / Husbandry Services (Customs, immigration, port captaincy)
Mobilize Technical Boarding or Request a Quote
Our mobile service squads and workshop specialists operate 24/7 across all commercial berths, anchorages, and shipyards worldwide.