Explosion-Proof Camera Placement on Oil Tankers & Marine Vessels

Surveillance camera placement on oil tankers and marine vessels is one of the most technically demanding applications in hazardous-area CCTV design. Unlike static land-based installations, a tanker presents a continuously changing environment: vessel motion, salt-air corrosion, deck flooding from wave wash, cargo vapor release during loading and discharge, and strict international maritime codes governing electrical equipment in cargo zones. Getting camera placement wrong means either creating a safety hazard or producing a surveillance blind spot in the most operationally critical areas of the vessel.

This guide covers the zone-by-zone camera placement strategy for crude oil tankers, product tankers, and LNG/LPG vessels, with reference to the applicable classification standards and equipment specifications at each location.

Hazardous Zone Classification on Oil Tankers

Oil tankers are classified under IEC 60092-502 (Electrical Installations in Ships — Tankers: Special Features) and IEC 60079-10-1 (Zone Classification for Gas Atmospheres). These standards define three hazardous zones on tankers based on the probability of encountering a flammable vapor concentration:

• Zone 0: Permanently hazardous. Inside cargo tanks, void spaces adjacent to cargo tanks, and enclosed spaces below deck that are connected to cargo systems (pumprooms, cofferdams). Zone 0 locations are normally inaccessible and rarely require camera coverage — any equipment entering Zone 0 must use Ex ia (intrinsically safe) protection at the highest equipment protection level (EPL Ga).
• Zone 1: Likely hazardous during normal operation. The cargo deck (main deck, forecastle deck over ballast tanks carrying cargo), areas within 3 meters of tank openings (Butterworth hatches, pressure-vacuum valves, ullage ports), within 1 meter of cargo manifolds and loading arms, and the entire enclosed pumproom. Zone 1 requires ATEX Category 2G / IECEx EPL Gb certified equipment — explosion-proof (Ex d) cameras are the standard choice.
• Zone 2: Hazardous only under abnormal conditions. The area extending from Zone 1 boundaries to approximately 3 meters outboard on the cargo deck (beyond the defined Zone 1 perimeter), and the space above the cargo deck to 2.4 meters height. Zone 2 permits ATEX Category 3G / IECEx EPL Gc equipment, although most naval architects specify Zone 1 equipment throughout the cargo deck for operational simplicity and future flexibility.

ATEX and IECEx certification is mandatory for all electrical equipment on the cargo deck and in enclosed hazardous spaces. North American flagged vessels operating in US waters may use NEC Class I Division 1 equivalents, but the vast majority of tankers worldwide are classed under ATEX/IECEx requirements per flag state and classification society (Lloyd’s Register, DNV, Bureau Veritas, ABS) rules.

Camera Placement by Vessel Area

Cargo Deck Coverage

The cargo deck is the highest-priority surveillance zone on any tanker. It is where cargo operations occur, where hydrocarbon vapors are most likely to concentrate during loading and discharge, and where the greatest risk of fire and explosion exists. OCIMF (Oil Companies International Marine Forum) guidelines and many terminal operator requirements now mandate continuous video surveillance of all cargo manifold connections during ship-to-shore transfer operations.

Recommended placement strategy:

• Mount explosion-proof PTZ cameras on the bridge wings and/or on raised pedestals at the forecastle and poop deck to provide elevated overview of the entire cargo deck. A well-positioned PTZ at each end of the vessel can cover the full manifold area under optical zoom.
• Install fixed explosion-proof IP cameras at each cargo manifold cluster (port and starboard amidships), positioned to capture the loading arm connection, drip trays, and immediate deck area within 5 meters of the manifold. Two cameras per manifold (from opposing angles) eliminate blind spots from the loading arm structure.
• Install fixed cameras at each cargo tank hatch/ullage port cluster. During loading operations, overfill incidents frequently begin at tank openings — a fixed camera provides both real-time monitoring and post-incident video evidence.
• Provide coverage of the bow and stern mooring stations for crew safety and port security compliance.

Camera mounting height on cargo deck should be a minimum of 4.5 meters above deck level to avoid obstruction by cargo hoses and to place the camera body above the Zone 1 vapor accumulation layer (which is densest within 1 meter of the deck surface where heavy hydrocarbon vapors settle).

Pumproom Surveillance

The cargo pumproom is classified Zone 1 (often treated as Zone 0 equivalent by classification societies) and is the location of the highest proportion of tanker fires historically. Cargo pumps, stripping pumps, and their drive shafts present ignition risks from mechanical seal failures and overheating bearings. SOLAS (Safety of Life at Sea) and classification society rules require continuous monitoring of the pumproom during cargo operations on vessels above a certain deadweight tonnage.

Equipment requirements: The pumproom environment combines Zone 1 gas hazard with extreme vibration from running pumps, high humidity and condensation from temperature differentials with the sea, oil mist, and near-zero lighting during unmanned operation. Camera specifications must include:

• ATEX Zone 1 / IECEx EPL Gb rating (Ex d or Ex de protection)
• IP66 or IP67 for condensation and washdown resistance
• 316L stainless steel housing for salt and hydrocarbon vapor resistance
• Anti-vibration mounting bracket with rubber isolation pads
• Built-in IR illumination (50-meter range minimum) for operation during manned entry lighting-off conditions

A minimum of two cameras should be installed in the pumproom: one providing an overview of the pump deck and another covering the cofferdam access hatch and ladder. Additional cameras at each main pump bearing housing provide thermal-anomaly detection capability if thermal cameras are specified.

Engine Room and Machinery Spaces

The main engine room on tankers is classified Zone 2 or non-hazardous depending on the vessel’s configuration, but the purifier room (fuel oil and lube oil centrifuges), steering gear room, and bow thruster compartment often carry Zone 2 classification due to the presence of flammable oil mist. Standard marine IP cameras (non-Ex rated) are acceptable in Zone 2 and non-hazardous machinery spaces.

For engine room CCTV, focus coverage on the main engine top platform (for fuel injection pump monitoring), the purifier room (fire risk from centrifuge oil mist), and the engine room entrance/exit ladders for crew mustering and man-overboard monitoring.

Bridge Wings and Navigation Areas

Bridge wings are outside the hazardous zone classification on most tanker designs, but they are the optimal mounting position for cargo deck overview cameras due to their elevation, structural strength, and access for maintenance. Bridge wing cameras must still carry maritime IP66 or IP67 ratings for heavy spray and rain exposure and must withstand the vessel’s full roll and pitch motion without loosening.

CCTV coverage of the bridge itself (non-hazardous) supports crew conduct monitoring, remote inspection by fleet management, and post-incident investigation. ISPS Code requirements for port security typically include camera coverage of gangways, access doors, and the bridge access ladder.

Environmental Specifications for Marine Installation

Tanker camera systems face environmental conditions that exceed most land-based installations:

• Salt fog corrosion: IEC 60945 (Maritime Navigation and Radiocommunication Equipment) specifies salt fog testing at 5% NaCl concentration for 96 hours. Aluminum enclosures will corrode within 2-3 years in offshore conditions — specify 316L stainless steel or GRP (fiberglass) housings for cargo deck and pumproom installations.
• Wave wash (IP68): Cameras on the main cargo deck foreward of amidships are routinely submerged during heavy weather. IP67 (30 minutes at 1 meter) is a minimum; IP68 (continuous submersion) is preferable for any camera mounted below the level of the main deck weather deck guard rail.
• Vibration (IEC 60068-2-6): Pumproom and engine room cameras must be tested per IEC 60068-2-6 (5-100 Hz, 1g acceleration). Standard camera mounting brackets will loosen and fail within months in continuous pump vibration environments — use stainless vibration-isolating mounts.
• Temperature range: Tankers operating in Arctic routes (Norway, Russia, Canada) experience -40 C ambient. Ensure cameras carry cold-start ratings to this temperature. Cameras operating in Persian Gulf / Red Sea conditions must handle +60 C ambient plus direct solar radiation (raising housing surface temperatures to +80 C or above).

IMO SOLAS and OCIMF Compliance

International Maritime Organization SOLAS Chapter II-2 (Fire Protection) and OCIMF Mooring Equipment Guidelines (MEG4) are the primary regulatory references for tanker CCTV. Key requirements include:

• Pumproom monitoring: SOLAS II-2/11.6 requires fixed fire detection and alarm in pumprooms. Camera systems complement (but do not replace) fixed gas detectors and fire detectors. Many major oil companies’ vessel inspection standards (Shell, BP, ExxonMobil SIRE criteria) include questions on pumproom CCTV provisions.
• Cargo manifold coverage: OCIMF Ship Inspection Report Programme (SIRE) VIQ 7th Edition questions cover whether the cargo manifold area has CCTV coverage during ship-to-shore transfer operations.
• Port security (ISPS Code): The International Ship and Port Facility Security Code requires security plans to address monitoring of restricted access areas, gangways, and deck access points. CCTV is the standard technical implementation for these requirements.

Related Resources

• Explosion-Proof Cameras: The Complete Guide for 2026 — Full overview of classifications, certifications, and selection criteria
• FPSO and Offshore Platform Camera Systems — Fixed platform and FPSO-specific requirements
• ATEX vs. IECEx Certifications Explained — How to read Ex markings and select the right certification
• Explosion-Proof vs. Intrinsically Safe Cameras — Protection method comparison for Zone 1 equipment

About the Author

Daniel Fernandez

Daniel Fernandez is a hazardous area security systems specialist with over a decade of experience specifying ATEX, IECEx, UL Class I Division 1, and cUL certified surveillance equipment for oil and gas, chemical, mining, pharmaceutical, and offshore environments. He holds expertise in NEC and IEC area classification standards and has consulted on explosion-proof camera system designs across North America, Europe, and the Middle East.