Electro-Technical Careers
The ETO certificate track was introduced by the Manila Amendments 2010. It has one CoC tier — STCW Regulation III/6, operational level. There is no management-level ETO defined in STCW. Senior ETO titles on cruise ships and large vessels are company seniority designations, not a separate STCW class.
The supporting rating level — Electro-Technical Rating — is a Certificate of Proficiency under STCW Regulation III/7, also introduced at Manila 2010.
One tier, operational level.
STCW Regulation III/6 defines a single CoC capacity: Electro-Technical Officer. Unlike the deck and engine officer ladders — which each have a management tier (Master, Chief Mate, Chief Engineer, 2/E) above an operational tier — the ETO track has no management-level CoC above it. The Regulation III/6 CoC is the ceiling of the STCW ETO ladder.
Operational level · STCW Regulation III/6 · Manila Amendments 2010
Electro-Technical Officer (ETO)
Responsible for the maintenance and repair of electrical, electronic and control systems aboard. This includes main switchboard and power systems, automation and control systems, navigation and communication electronics, GMDSS radio equipment, and safety systems.
Certificate: CoC — Electro-Technical Officer (STCW Regulation III/6; Table A-III/6). Operational level. Introduced by Manila Amendments 2010.
This is the single CoC tier in the ETO track. STCW creates no management-level capacity above III/6.
Support level · STCW Regulation III/7 · Manila Amendments 2010
Electro-Technical Rating (ETR)
Assists the ETO with electrical and electronic maintenance tasks under supervision. Holds a Certificate of Proficiency rather than a Certificate of Competency — the same distinction as deck and engine ratings versus deck and engine officers.
Certificate: Certificate of Proficiency — Electro-Technical Rating (STCW Regulation III/7; Table A-III/7). CoP, not a CoC. Support level. Introduced by Manila Amendments 2010.
Company title, not a separate STCW class.
Large cruise ships and sophisticated merchant vessels often designate a "Senior ETO" or "SETO" to lead a team of ETOs. Job ads sometimes list this as a distinct rank. It is not. STCW Regulation III/6 creates one CoC tier with no distinct management-level capacity. The Senior ETO holds the same certificate as the ETOs they supervise — the "Senior" designation is the operator's internal seniority layer.
What STCW defines
One CoC: Regulation III/6 ETO (operational level). One CoP: Regulation III/7 ETR (support level). Nothing above III/6 in the ETO track.
What companies add
Senior ETO / SETO — a seniority designation for the most experienced ETO on vessels with multiple ETOs. Still holds the III/6 CoC. The seniority is company-assigned.
Merchant, cruise and yacht.
The III/6 CoC is vessel-type agnostic — the same certificate is valid on any ship. How the ETO role is structured and titled varies by sector.
Merchant fleet
One ETO per vessel on most ocean-going vessels, reporting to the Chief Engineer Officer. Role scope is electrical, electronic and automation systems, plus GMDSS radio maintenance. Vessel types: container ships, bulk carriers, tankers, OSVs, ro-ro. The title is straightforward: ETO.
Cruise ships
Large cruise ships carry teams of two to four ETOs under a Senior ETO (SETO). The SETO and all ETOs hold the same III/6 CoC. Additional scope includes passenger entertainment systems, integrated bridge systems, ship-wide Wi-Fi infrastructure and stage automation. The ETO team sits within the engine department.
Superyachts
Larger yachts (>40m, flag-state-dependent) carry an ETO holding the same III/6 CoC. Scope includes integrated bridge systems, satellite communications, AV systems and automation. Single-ETO vessels are typical — no Senior ETO tier arises.
From ETR to ETO.
Electro-Technical Rating (ETR)
Entry point. CoP under STCW Regulation III/7. Assist ETO aboard; accumulate sea service and build system knowledge.
ETO Cadet / Trainee ETO
Structured training programme accumulating STCW-approved sea service toward the III/6 CoC. Typically company-sponsored or via maritime college ETO programme.
Electro-Technical Officer (ETO)
CoC under STCW Regulation III/6. The top of the STCW ETO ladder. All Senior ETO / SETO designations are company-layer seniority above this same CoC.
India and the UK are among the principal ETO pathway entry routes. The pathways pages cover the full training structure and sea-time requirements.
Talk to ETOs.
The Career & Recruitment category on the Marine One forum covers the ETO track — from ETR starting points to Senior ETO contracts on cruise ships.