Reference metadata describe statistical concepts and methodologies used for the collection and generation of data. They provide information on data quality and, since they are strongly content-oriented, assist users in interpreting the data. Reference metadata, unlike structural metadata, can be decoupled from the data.
Turkish Statistical Institute (TurkStat) Devlet Mahallesi Necatibey Cad. No:114 06420 Cankaya Ankara/Turkey
1.6. Contact email address
Confidential because of GDPR
1.7. Contact phone number
Confidential because of GDPR
1.8. Contact fax number
2.1. Metadata last certified
11 April 2022
2.2. Metadata last posted
11 April 2022
2.3. Metadata last update
11 April 2022
3.1. Data description
Maritime transport data refer to gross weight of goods (in tonnes), passenger movements (in number of passengers) as well as for vessel traffic (in number of vessels and in gross tonnage of vessels).
3.2. Classification system
The following classifications are applicable:
Maritime Coastal area: the nomenclature is based on the Geonomenclature (the country nomenclature for the external trade statistics of the Community and statistics of trade between Member States, originally drawn up by the Council Regulation (EEC) N°1736/75) in force in the year to which the data refer (RAMON: https://showvoc.op.europa.eu/#/datasets/ESTAT_Geonomenclature_2021_%28GEONOM_2021%29/data).
Ports: the codes used are the official UN/LOCODEs, when they exist. If a port does not have an official UN/LOCODE a provisional (numeric) code is attributed to the port. As soon as an official UN/LOCODE is attributed by the United Nations Economic Commission for Europe (UNECE) to the port at the request of the competent national authority, the provisional (numeric) code is replaced by the final official one. In exceptional cases (see for example one-port transport or special aggregation for minor ports) permanent numeric codes are attributed to special locations or activities. The code list of UN/LOCODE is available by country through the following link: http://www.unece.org/cefact/locode/service/location.html. According to the relevant directive, Eurostat draws up a list of ports, coded and classified according to countries and maritime coastal areas. The list of ports is included in implementing legal acts and as such is published in the Official Journal of the European Union (the "official" list). The most recent list of ports published in the Official Journal is found in Commission Decision (EU) 2018/1007
Nationality of registration of vessels: the nomenclature used is the Geo-nomenclature (the country nomenclature for the external trade statistics of the Community and statistics of trade between Member States, originally drawn up by the Council Regulation (EEC) N°1736/75) in force in the year to which the data refer (RAMON: https://showvoc.op.europa.eu/#/datasets/ESTAT_Geonomenclature_2021_%28GEONOM_2021%29/data).
The type of ship classification is harmonised with an internationally agreed International Classification of Ship by Type (ICST).
Port -A place having facilities for merchant ships to moor and to load and/or unload cargo or to disembark and/or embark passengers to or from vessels, usually directly to a pier. Reporting Port-A statistical port for which statistics of inward and outward maritime transport flows are compiled. Maritime coastal area (MCA) -A maritime coastal area is defined as a contiguous stretch of coastline, together with islands offshore. Within a country, an MCA is defined either in terms of one or more ranges of ports along its coastline, or in terms of the latitude and longitude of one or more sets of extremities of the coastal area. Riverbanks can be included. Normally the coastline of each country is allocated to a single maritime coastal area and the coastlines of more than one country may form a single maritime coastal area. There are some exceptions. For example, the USA is separated into a number of maritime coastal areas to cover its overall coastline. For some countries, two separate stretches of coastline may be counted as one maritime coastal area, as, for example, the Atlantic and Pacific coastlines of Mexico. Carriage of goods and passengers by sea -The movement of goods and passengers using seagoing vessels, on voyage which are undertaken wholly or partly by sea. The scope of the Maritime Directive 2009/42/EC also includes goods:
Shipped to offshore installations;
Reclaimed from seabed and unloaded in ports.
Bunkers and stores supplied to vessels shall be excluded from the scope.
Seagoing vessel -Floating marine structure with one or more surface displacement hulls. In the context of the Directive, sea-going vessels are vessels other than those which navigate exclusively in inland waters or in waters within, or closely adjacent to, sheltered waters or areas where port regulations apply. Nationality of registration of seagoing vessel (Flag state) -Every ship is entered in a registry (i.e. list) of ships. Registries are maintained by many countries, each having a set of rules regarding safety procedures, inspection schedules, manning numbers and nationalities for crew and officers, training requirements, etc. Ship-owners select which registry to use based on the balance between the relative cost implications of the rules of each registry and possible penalties from insurance assessments dependent on these rules. Type of cargo- The type of cargo classification, set according to the UNECE - Codes for types of cargo, packages and packaging materials, Recommendation 21, Geneva, March 1986, describes how the goods are being transported in terms of the vessels being used and the port facilities required to handle them. It is therefore very different from the categories of goods classification. Freight container-Special box to carry freight, strengthened and stackable and allowing horizontal or vertical transfers.
Swap bodies are excluded. Although without internal volume flats used in maritime transport should be considered to be a special type of container and therefore are included here. For a fuller description, reference should be made to ISO 668 and 1496.The related term "container cargo" refers to containers, with or without cargo, which are lifted on or off the vessels which carry them by sea.
Ro-Ro unit- This means wheeled equipment for carrying cargo, such as a truck, trailer or semi-trailer, which can be driven or towed onto a vessel. Port or ships' trailers are included in this definition. Classifications should follow United Nations ECE Recommendation No 21 'Codes for types of cargo, packages and packaging materials'. Live animals on the hoof are included. Vehicles being transported as cargo as opposed to a means of transport for freight are recorded in the separate headings of the Ro-Ro cargo classification, when they are rolled on or rolled off a vessel on their own wheels. Ro-Ro cargo -This means goods, whether or not in containers, on Ro-Ro units, and Ro-Ro units, which are rolled on and off the vessels, which carry them by sea. Gross weight of goods -The gross weight of each consignment is the weight of the actual goods together with the immediate packaging in which they are being transported from origin to destination, but excluding the tare weight of containers or Ro-Ro units (e.g. containers, swap bodies and pallets containing goods as well as road goods vehicles, wagons or barges carried on the vessel). This measure of quantity is different from that used in trade statistics, namely the net weight of goods and different from statistics collected on other transport modes where the tare weight is included. Where goods are transported in a road goods vehicle, in a container, or other intermodal transport unit, the gross weight of the goods does not include the tare weigh tof the transport unit. Gross tonnage -This means the measure of the overall size of a ship determined in accordance with the provisions of the International Convention on Tonnage Measurement of Ships, 1969. Passenger Any person who makes a sea journey on a merchant ship. Service staff assigned to merchant ships is not regarded as passengers. Non-fare paying crewmembers travelling but not assigned and infants in arms are excluded. Cruise passenger -This means a sea passenger making a sea journey on a cruise ship. Passengers on day excursions are excluded. Cruise ship -This means a passenger ship intended to provide passengers with a full tourist experience. All passengers have cabins. Facilities for entertainment aboard are included. Ships operating normal ferry services are excluded, even if some passengers treat the service as a cruise. In addition, cargo-carrying vessels able to carry a very limited number of passengers with their own cabins are also excluded. Ships intended solely for day excursions are also excluded. Cruise passenger excursion -This means a short visit by a cruise passenger to a tourist attraction associated with a port while retaining a cabin on board.
3.5. Statistical unit
The data used in the domain are collected at port level.
3.6. Statistical population
Detailed data are provided for ports handling more than one million tonnes of goods or recording more than 200 000 passenger movements annually (Main ports). The other ports are required to provide summary data. However, detailed data may be included also for minor ports on a voluntary basis.
3.7. Reference area
Turkey.
3.8. Coverage - Time
The data are available since 2004.
3.9. Base period
Not applicable.
The units used depend on the variables collected within each data set and are: gross weight of goods expressed in thousands of tonnes; number of passengers in thousands, number of vessels.
TEUs: Twenty feet equivalent units, expressed in units or in thousands depending on the table. TEU calculation coefficients: • 20-ft freight units (1 TEU) • 40-ft freight units (2 TEU) • Freight units over 40-ft long (2.25 TEU).
Quarters for datasets A1, A2, C1, C2, D1, F1 and F2. Whole calendar years for datasets A3, B1 and E1.
6.1. Institutional Mandate - legal acts and other agreements
National Level:
The Official Statistics Programme (OSP), based on the Statistics Law of Turkey No 5429, is prepared for a 5-year-period in order to determine the basic principles and standards dealing with the production and dissemination of official statistics and to produce reliable, timely, transparent and impartial data required at national and international level. Hence, maritime statistics are disseminated in scope of OSP.
The dissemination is based on the terms of Commission Decision 2001/423/EC on arrangements for publication or dissemination of the statistical data collected pursuant to Council Directive 95/64/EC on statistical returns in respect of carriage of goods and passengers by sea.
6.2. Institutional Mandate - data sharing
Not applicable.
7.1. Confidentiality - policy
National level:
Procedures and principles regarding data confidentiality and security in statistical production are regulated in Articles 12, 13 and 14 of Turkish Statistical Law No. 5429. "Regulation on Procedures and Principles on Data Confidentiality and Confidential Data Security in Official Statistics" was prepared by TURKSTAT to regulate the confidentiality and security practices in the statistical studies produced within the framework of the Official Statistics Programme and published in the Official Gazette dated 20/06/2006, number 26204.
Furthermore, the Law on the Protection of Personal Data No. 6698 dated 24/03/2016 covers "real persons and legal entities that process all personal data in a non-automatic manner, either completely or partially automatic, or part of any data recording system", situated in the Law "Those who process data with data responsibilities can not disclose the personal data they have learned to others in contradiction with the provisions of this Law and cannot use it except for the purpose of processing. This obligation continues after leaving the office " provision of personal data is guaranteed. However, pursuant to Article 28 (b) of the related law, "the processing of personal data with purposes such as research, planning and statistics by bringing the statistical data anonymously" was accepted as an exception.
European level:
(recital 24 and Article 20(4)) of 11 March 2009 (OJ L 87, p. 164), stipulates the need to establish common principles and guidelines ensuring the confidentiality of data used for the production of European statistics and the access to those confidential data with due account for technical developments and the requirements of users in a democratic society.
7.2. Confidentiality - data treatment
Article 4 of Commission Decision 2001/423/EC mention that: "the highest level of detail in which data may be published or disseminated is the level of port to and from maritime coastal area. The Commission may however publish at more aggregate level if the quality and/or completeness of information are not appropriate in such detail."
8.1. Release calendar
Maritime statistics are disseminated according to Official Statistics Program (OSP) on specific dates.
8.2. Release calendar access
https://www.officialstatistics.gov.tr/en/
8.3. Release policy - user access
National data release calendar is determined in scope of OSP and announced to public.
Quarterly maritime transport statistics are published within 10 months after the reference period and annual maritime transport statistics within 16 months after the reference period.
Annual Maritime Trade Statistics Book (https://denizcilik.uab.gov.tr/yayinlar)
10.3. Dissemination format - online database
Not applicable
10.4. Dissemination format - microdata access
Not applicable
10.5. Dissemination format - other
Monthly and annual maritime statistics regarding various topics could be reached in MS Excel format via the link https://denizcilikistatistikleri.uab.gov.tr/
10.6. Documentation on methodology
Methodological notes are available in the online Statistics Explained articles on Maritime transport statistics and in the Reference Manual on Maritime Transport Statistics.
10.7. Quality management - documentation
Not available
11.1. Quality assurance
The system follows as far as possible the European Statistics Code of practice and Quality Assurance Framework of the European Statistical System, more precisely Principle 4: Commitment to Quality: Quality policy is defined and made available to the public. An organisational structure and tools are in place to deal with quality management. There are procedures in place to plan, monitor and improve the quality of the statistical processes. Procedures based on quality reporting are in place to internally monitor product quality. Results are analysed regularly and improving actions are undertaken, if needed (for example after obtaining annual summary results and mirror checks reports from Eurostat). There is a regular and thorough review of the key statistical outputs using also external experts where appropriate.
11.2. Quality management - assessment
Data quality can be assessed as high. There is a set of validation rules and quality checks put in place, which detect various types of issues. Annually, Eurostat provides a data quality report with a summary of the main findings affecting quality as well as showing the solution adopted and the materiality of the existing differences. Mirror checks and checks for the consistency over times are prepared as well.
12.1. Relevance - User Needs
The main users of Maritime Transport Statistics are national and local authorities, universities, public and private research institutes, national and trade associations in the transport, environment and energy sectors.
12.2. Relevance - User Satisfaction
No studies are conducted to measure user needs and satisfaction.
12.3. Completeness
According to the regulation, required statistical data tables are complately sent to Eurostat regularly.
13.1. Accuracy - overall
The overall accuracy is considered to be good. The data source is the administrative record. These are the records obtained through Port Single Window System. However, some errors may occur in the statistics due to measurement errors or processing errors.
13.2. Sampling error
Not applicable for maritime transport data collection.
13.3. Non-sampling error
a) Measurement errors
No estimates of measurement errors are available. However, some measurement errors may occur as a result of errors by shipping agents. A large share of so-called “unknown” instead of specific information for type of cargo, type of goods, type of vessel, etc. is also a factor which will reduce the accuracy of the maritime statistics on the more detailed levels.
b) Processing errors
Between data collection and the beginning of statistical analysis for the production of statistics, data must undergo a certain processing: coding, data entry, data editing, imputation, etc.
14.1. Timeliness
Quarterly data should be transmitted by Member States to Eurostat within five months of the end of the period of observation; annual data within eight months. The Commission (Eurostat) shall disseminate appropriate statistical data with a periodicity comparable to that of the results transmitted (Directive 2009/42/EC).
14.2. Punctuality
The deadlines for transmission are usually met.
15.1. Comparability - geographical
Maritime transport statistics has been adapted to EU requirements, so maritime data are comparable with the data of the members of the European Statistical System
15.2. Comparability - over time
Data are comparable to previous months/years and are temporally consistent.
15.3. Coherence - cross domain
The data source of maritime statistics is the data obtained with the Port Single Window System. Consistency research is not conducted with any other data source.
15.4. Coherence - internal
In the monthly controls, the previous month's data is checked and the consistency of the data is ensured after the controls.
Burden of data entry is not a separate quality component but an important factor in assessing the quality, since it usually has an impact on all other quality components.
17.1. Data revision - policy
Maritime statistics are revised at the end of year.
17.2. Data revision - practice
Coherence between provisional and final data shows absolute or relative difference between the disseminated value at first release and the value at the release of final data. Revisions are only corrections that are part of the regular procedure of publishing statistical results.
18.1. Source data
Administrative data source of Port Management Information System
18.2. Frequency of data collection
Frequency of data collection is Monthly and Yearly.
18.3. Data collection
Port Single Window System database
18.4. Data validation
Data are comparable to previous months/years and are temporally consistent.
18.5. Data compilation
Port Single Window System
18.6. Adjustment
Not applicable
No comments.
Maritime transport data refer to gross weight of goods (in tonnes), passenger movements (in number of passengers) as well as for vessel traffic (in number of vessels and in gross tonnage of vessels).
Port -A place having facilities for merchant ships to moor and to load and/or unload cargo or to disembark and/or embark passengers to or from vessels, usually directly to a pier. Reporting Port-A statistical port for which statistics of inward and outward maritime transport flows are compiled. Maritime coastal area (MCA) -A maritime coastal area is defined as a contiguous stretch of coastline, together with islands offshore. Within a country, an MCA is defined either in terms of one or more ranges of ports along its coastline, or in terms of the latitude and longitude of one or more sets of extremities of the coastal area. Riverbanks can be included. Normally the coastline of each country is allocated to a single maritime coastal area and the coastlines of more than one country may form a single maritime coastal area. There are some exceptions. For example, the USA is separated into a number of maritime coastal areas to cover its overall coastline. For some countries, two separate stretches of coastline may be counted as one maritime coastal area, as, for example, the Atlantic and Pacific coastlines of Mexico. Carriage of goods and passengers by sea -The movement of goods and passengers using seagoing vessels, on voyage which are undertaken wholly or partly by sea. The scope of the Maritime Directive 2009/42/EC also includes goods:
Shipped to offshore installations;
Reclaimed from seabed and unloaded in ports.
Bunkers and stores supplied to vessels shall be excluded from the scope.
Seagoing vessel -Floating marine structure with one or more surface displacement hulls. In the context of the Directive, sea-going vessels are vessels other than those which navigate exclusively in inland waters or in waters within, or closely adjacent to, sheltered waters or areas where port regulations apply. Nationality of registration of seagoing vessel (Flag state) -Every ship is entered in a registry (i.e. list) of ships. Registries are maintained by many countries, each having a set of rules regarding safety procedures, inspection schedules, manning numbers and nationalities for crew and officers, training requirements, etc. Ship-owners select which registry to use based on the balance between the relative cost implications of the rules of each registry and possible penalties from insurance assessments dependent on these rules. Type of cargo- The type of cargo classification, set according to the UNECE - Codes for types of cargo, packages and packaging materials, Recommendation 21, Geneva, March 1986, describes how the goods are being transported in terms of the vessels being used and the port facilities required to handle them. It is therefore very different from the categories of goods classification. Freight container-Special box to carry freight, strengthened and stackable and allowing horizontal or vertical transfers.
Swap bodies are excluded. Although without internal volume flats used in maritime transport should be considered to be a special type of container and therefore are included here. For a fuller description, reference should be made to ISO 668 and 1496.The related term "container cargo" refers to containers, with or without cargo, which are lifted on or off the vessels which carry them by sea.
Ro-Ro unit- This means wheeled equipment for carrying cargo, such as a truck, trailer or semi-trailer, which can be driven or towed onto a vessel. Port or ships' trailers are included in this definition. Classifications should follow United Nations ECE Recommendation No 21 'Codes for types of cargo, packages and packaging materials'. Live animals on the hoof are included. Vehicles being transported as cargo as opposed to a means of transport for freight are recorded in the separate headings of the Ro-Ro cargo classification, when they are rolled on or rolled off a vessel on their own wheels. Ro-Ro cargo -This means goods, whether or not in containers, on Ro-Ro units, and Ro-Ro units, which are rolled on and off the vessels, which carry them by sea. Gross weight of goods -The gross weight of each consignment is the weight of the actual goods together with the immediate packaging in which they are being transported from origin to destination, but excluding the tare weight of containers or Ro-Ro units (e.g. containers, swap bodies and pallets containing goods as well as road goods vehicles, wagons or barges carried on the vessel). This measure of quantity is different from that used in trade statistics, namely the net weight of goods and different from statistics collected on other transport modes where the tare weight is included. Where goods are transported in a road goods vehicle, in a container, or other intermodal transport unit, the gross weight of the goods does not include the tare weigh tof the transport unit. Gross tonnage -This means the measure of the overall size of a ship determined in accordance with the provisions of the International Convention on Tonnage Measurement of Ships, 1969. Passenger Any person who makes a sea journey on a merchant ship. Service staff assigned to merchant ships is not regarded as passengers. Non-fare paying crewmembers travelling but not assigned and infants in arms are excluded. Cruise passenger -This means a sea passenger making a sea journey on a cruise ship. Passengers on day excursions are excluded. Cruise ship -This means a passenger ship intended to provide passengers with a full tourist experience. All passengers have cabins. Facilities for entertainment aboard are included. Ships operating normal ferry services are excluded, even if some passengers treat the service as a cruise. In addition, cargo-carrying vessels able to carry a very limited number of passengers with their own cabins are also excluded. Ships intended solely for day excursions are also excluded. Cruise passenger excursion -This means a short visit by a cruise passenger to a tourist attraction associated with a port while retaining a cabin on board.
The data used in the domain are collected at port level.
Detailed data are provided for ports handling more than one million tonnes of goods or recording more than 200 000 passenger movements annually (Main ports). The other ports are required to provide summary data. However, detailed data may be included also for minor ports on a voluntary basis.
Turkey.
Quarters for datasets A1, A2, C1, C2, D1, F1 and F2. Whole calendar years for datasets A3, B1 and E1.
The overall accuracy is considered to be good. The data source is the administrative record. These are the records obtained through Port Single Window System. However, some errors may occur in the statistics due to measurement errors or processing errors.
The units used depend on the variables collected within each data set and are: gross weight of goods expressed in thousands of tonnes; number of passengers in thousands, number of vessels.
TEUs: Twenty feet equivalent units, expressed in units or in thousands depending on the table. TEU calculation coefficients: • 20-ft freight units (1 TEU) • 40-ft freight units (2 TEU) • Freight units over 40-ft long (2.25 TEU).
Port Single Window System
Administrative data source of Port Management Information System
Quarterly maritime transport statistics are published within 10 months after the reference period and annual maritime transport statistics within 16 months after the reference period.
Quarterly data should be transmitted by Member States to Eurostat within five months of the end of the period of observation; annual data within eight months. The Commission (Eurostat) shall disseminate appropriate statistical data with a periodicity comparable to that of the results transmitted (Directive 2009/42/EC).
Maritime transport statistics has been adapted to EU requirements, so maritime data are comparable with the data of the members of the European Statistical System
Data are comparable to previous months/years and are temporally consistent.
