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Seafarer documentsCertificates and qualifications

Certificate of Proficiency – Rating Forming Part of an Engineering Watch

  • STCW III/4
  • Full entry
  • Checked 6 October 2026
Document type
Training certificate
Validity
As shown on the issued document
Names in other countries
47 countries
Contents7

1 What it covers

Certificate of Proficiency – Rating Forming Part of an Engineering Watch (STCW III/4) certifies competence in the named capacity within the limitations stated on the certificate. It is needed by ratings forming part of an engineering watch or designated for duties in a periodically unmanned engine room, on ships with propulsion machinery of 750 kW or more. Validity: as shown on the issued document.1–3

2 What it consists of

The standard of competence is set by table A-III/4 of the Code.1,2

3 Validity and renewal

Document validity. The expiry date, if the issuing system sets one, is shown on the document itself. This reference does not calculate personal expiry dates.

Maintaining competence. The STCW Convention sets no single revalidation interval for this certificate.1,3

4 Which positions

The need follows from the ship and the duties on board, not from the title of the position. In this reference the document appears in the requirements of these positions:

5 Names in 47 countries

How national systems name this document. The original name is given where the source has it; the English name is our editorial rendering.

Same document

CountryName in the issuing country
South AfricaOrdinary seafarer engineIssued by: South African Maritime Safety Authority · source
UkraineEngineering watch rating (second-class motorman)source
GeorgiaEngine Watch RatingEngineering watch ratingIssued by: Maritime Transport Agency of Georgia · source
NigeriaRATING FORMING PART OF ENGINE ROOM WATCHRating (Forming Part of Engineering Watch)Issued by: Nigerian Maritime Administration and Safety Agency · source
EstoniaVahimotoristi tunnistusEngine-Room Watch Rating CertificateIssued by: Transpordiamet · source

Related document

CountryName in the issuing country
IndiaCertificate of Proficiency – Navigational Watch and Engine-Room WatchIssued by: Directorate General of Maritime Administration (DGMA) · source
Show all 47 countries

Same document

CountryName in the issuing country
BulgariaEngine-Room Watch Ratingsource
PeruMarinero de máquinasIssued by: Dirección General de Capitanías y Guardacostas · source
PhilippinesCertificate of Proficiency – Rating Forming Part of an Engineering WatchIssued by: Maritime Industry Authority · source
GermanyWachbefähigung Maschine TWBEngineering watch rating (TWB)Issued by: BSH · source
FranceCertificat de mécanicien de quart machineEngineering watch rating certificateIssued by: French maritime administration · source
NetherlandsWachtlopend gezel machinekamer alle schepenEngineering watch rating certificateIssued by: Ministerie van Infrastructuur en Waterstaat / Kiwa Register · source
PortugalCertificado de qualificação para o serviço de quartos de máquinasEngineering watch ratingIssued by: DGRM · source
ThailandRating forming part of an engine-room watchCertificate of Proficiency – Rating forming part of an engine-room watchIssued by: Marine Department · source
GhanaEngine WatchkeepingIssued by: Ghana Maritime Authority · source
AlgeriaCertificat d’aptitude de matelot faisant partie d’une équipe de quart à la machineCertificate of Proficiency – Rating Forming Part of an Engineering WatchIssued by: Administration chargée de la marine marchande · source
PakistanWatchkeeping Rating Certificate – Rating forming part of an engine-room watchIssued by: Mercantile Marine Department / Directorate General Ports and Shipping · source
NorwayCertificate of Proficiency for ratings forming part of an engineering watchRating forming part of an engineering watchIssued by: Norwegian Maritime Authority / Sjøfartsdirektoratet · source
LiberiaFireman/Water TenderFireman/Water Tender – Watchstander Certificate or EndorsementIssued by: Liberia Maritime Authority / Deputy Commissioner · source
LiberiaOiler/Motorman – Watchstander QualificationIssued by: Liberia Maritime Authority / Deputy Commissioner · source
BahamasCertificate of Proficiency – Rating Forming Part of an Engineering WatchIssued by: Bahamas Maritime Authority · source
Hong KongCertificate of Proficiency for Engine Room Watch RatingsIssued by: Hong Kong Marine Department · source
Japan機関部航海当直部員Engine Watch Rating – National RecognitionIssued by: Ministry of Land, Infrastructure, Transport and Tourism · source
United StatesRatings Forming Part of an Engineering WatchIssued by: United States Coast Guard, National Maritime Center · source
Latviasardzes motoristsCertificate of Proficiency – Rating Forming Part of an Engineering WatchIssued by: Maritime Administration of Latvia / Latvian Seamen’s Registry · source
MyanmarRating forming part of an engine-room watchCertificate of Proficiency – Rating forming part of an engine-room watchIssued by: Department of Marine Administration · source
ItalyComune di guardia in macchinaEngineering watch ratingIssued by: Ministero delle Infrastrutture e dei Trasporti / maritime administration · source
SwedenVaktgående maskinpersonalEngineering watch ratingIssued by: Transportstyrelsen · source
FinlandVahtimies, koneWatchkeeping rating's certificate, engineIssued by: Traficom · source
CanadaEngine-room RatingIssued by: Transport Canada Marine Safety and Security · source
New ZealandEngine-room watch ratingIssued by: Maritime New Zealand · source
ArgentinaMarinero de MáquinasEngine Watch RatingIssued by: Agencia Nacional de Puertos y Navegación; Prefectura Naval Argentina · source
ChileTripulante de la Guardia de MáquinasIssued by: Dirección General del Territorio Marítimo y de Marina Mercante · source
MalaysiaRating forming part of an engine-room watchCertificate of Proficiency – Rating forming part of an engine-room watchIssued by: Malaysia Marine Department · source
Sri LankaCertificate of Proficiency – Rating forming part of an engine-room watchIssued by: Merchant Shipping Secretariat / Director General of Merchant Shipping · source
ColombiaMarinero que forma parte de la guardia en una cámara de máquinas potencia propulsora mayor 750 kWRating Forming Part of an Engineering Watch, propulsion power over 750 kWIssued by: Dirección General Marítima (DIMAR) · source
EcuadorMarinero de Máquinas (Aceitero)Engine Watch Rating (Aceitero)Issued by: Dirección Nacional de los Espacios Acuáticos (DIRNEA), Armada del Ecuador · source
GibraltarEngine-room Watch-rating CertificateIssued by: Gibraltar Maritime Administration · source
IcelandAðstoðarmaður í vélRating Forming Part of an Engine-Room WatchIssued by: Samgöngustofa · source
Sloveniačlan posadke v sestavi strojne stražeRating Forming Part of an Engine-Room WatchIssued by: Uprava Republike Slovenije za pomorstvo · source
Taiwan助理級輪機當值Rating Forming Part of an Engineering WatchIssued by: Maritime and Port Bureau / Ministry of Transportation and Communications · source
UruguayMarinero de guardia en cámara de máquinasEngine-Room Watch RatingIssued by: Prefectura Nacional Naval, Dirección Registral y de Marina Mercante (DIRME) · source
VanuatuEngine Watchkeeping RatingIssued by: Vanuatu Maritime Safety Authority (VMSA); Vanuatu International Shipping Registry (VISR) · source

Related document

CountryName in the issuing country
China值班机工Certificate of Proficiency – Rating Forming Part of an Engineering Watch (值班机工)Issued by: Maritime Safety Administration, Ministry of Transport · source
DenmarkVagtholdsbevisWatchkeeping certificateIssued by: Danish Maritime Authority / Søfartsstyrelsen · source
AustraliaIntegrated Rating II/4 and III/4Issued by: Australian Maritime Safety Authority · source
BrazilMarinheiro de MáquinasEngine Seafarer (MNM)Issued by: Marinha do Brasil, Diretoria de Portos e Costas · source
BrazilMoço de MáquinasJunior Engine Seafarer (MOM)Issued by: Marinha do Brasil, Diretoria de Portos e Costas · source

With limitations

CountryName in the issuing country
LiberiaGeneral Purpose-2 (GP-2)General Purpose-2 (GP-2) – Watchstander Certificate or EndorsementIssued by: Liberia Maritime Authority / Deputy Commissioner · source
FijiIntegrated RatingIssued by: Maritime Safety Authority of Fiji · source

"Related document" is a national document of its own system that relates to this type but is not automatically equal to it.

Required before: Certificate of Proficiency – Able Seafarer Engine STCW III/54

7 Frequently asked questions

Who needs the Certificate of Proficiency – Rating Forming Part of an Engineering Watch?

Ratings forming part of an engineering watch or designated for duties in a periodically unmanned engine room, on ships with propulsion machinery of 750 kW or more. In this reference it appears in the requirements of 1 position; whether you need it depends on the ship and your duties.1,2

How long is the Certificate of Proficiency – Rating Forming Part of an Engineering Watch valid?

The expiry date, if the issuing system sets one, is shown on the document itself. This reference does not calculate personal expiry dates. The STCW Convention sets no single revalidation interval for this certificate.1,3

What else is the Certificate of Proficiency – Rating Forming Part of an Engineering Watch called?

Also known as Certificate of Rating Forming Part of an Engineering Watch (STCW III/4), RFPEW. National names in 47 countries are listed on this page.

Rating Forming Part of an Engineering Watch (STCW III/4) | Rynda Crewing