GB18093-2025
Deck log book
航海日志
GB 18093-2025 is a current mandatory Chinese national standard for Deck log book. It appears in the Machinery compliance cluster with a product safety focus and has an implementation date of May 1, 2026.
Applicability depends on product scope, certification route, competent authority notices and transition rules. Requst for the translation or verify source before using this record in a compliance decision.
Compliance overview
Scope and applicability
This standard is mandatory for Chinese-flagged seagoing vessels engaged in international voyages, as well as coastal navigation vessels of 500 gross tonnage and above, or with a total main engine power of 750 kW and above. It is not applicable to inland waterway vessels or smaller coastal craft below these thresholds. The standard serves as the core regulatory document for the *Deck Log Book* used aboard these regulated ships.
Technical requirements
The standard specifies the comprehensive content and recording requirements for the Deck Log Book. It mandates that the logbook be divided into a left page and a right page. The left page must include sailing records, meteorological and sea state records, watchkeeping details, tank sounding records, and noon measurements. The right page must contain a remarks column and a major events record. Entries must be made with indelible blue-black or black ink, and any corrections must be signed and dated by the correcting officer. Key recording content includes detailed navigation parameters such as gyro-compass and magnetic compass courses, true course, leeway and drift angle, and log readings. Meteorological observations must follow specific symbols and scales for weather phenomena, visibility, wind force, cloud types, and wave levels. The standard also requires the recording of critical operational events, including arrival/departure procedures, pilotage, anchoring, AIS operation, and emergency drills. The Chief Officer is responsible for the daily review and safekeeping of the logbook, while the Master must supervise and sign to ensure completeness. Furthermore, the standard defines strict formatting and printing requirements. It dictates the exact layout, page numbering (Roman numerals for preliminary pages, Arabic for the 100-page main body), and material specifications, such as using 2mm cardboard for the cover and 100g offset paper for inner pages. Specific font and size requirements (e.g., *Song typeface*, *Kai typeface*) are mandated for different sections, including the cover, ship's main particulars table, and daily entry pages.
Testing methods
This standard does not involve laboratory testing methods. Instead, it prescribes observation and recording procedures for maritime navigation. Key observational protocols include standardized methods for determining sea surface visibility, wind force levels (based on the Beaufort scale), cloud classification, and wave height assessment. Compliance is verified through the accurate and chronological completion of the logbook entries as specified in the standard's appendices.
FAQs
What types of vessels are required to comply with GB 18093-2025?
The standard applies to Chinese-flagged seagoing vessels on international voyages, and coastal navigation vessels with a gross tonnage of 500 or above, or a main engine power of 750 kW or above.
What are the major updates in GB 18093-2025 compared to the 2000 version?
Key updates include revised recording content and requirements, the addition of "working language" and "printing basis" on the cover, updated meteorological symbols (e.g., adding "showery sleet" and "unobservable"), and changes to ship position symbols, removing outdated methods like Loran and adding modern ones like satellite positions.
Are there specific material and printing requirements for the Deck Log Book?
Yes, the standard mandates specific materials, such as a 2mm cardboard cover wrapped in kraft paper and red漆布, and 100g offset paper for inner pages. It also dictates exact dimensions, page numbering formats, and specific font and size requirements for all text.
The summary above provides a high-level overview of GB 18093-2025. To ensure complete compliance for your vessels operating in Chinese waters, a precise and professional translation of the full technical specifications is essential. Purchase our high-quality English translation of GB 18093-2025 today to access all detailed recording parameters, formatting tables, and meteorological observation symbols.
Applicability hints
- Type
- Safety
- CCS
- R22
- ICS
- 03.220.40
- Competent department
- Ministry of Transport
- Technical committee
- Ministry of Transport
Relationships
Replaces:GB 18093-2000