< Seamarks
Seamarks/Offshore Platforms
Offshore platform
The tags defined on this page will render in various nautical charts.
This page defines values for the "seamark:platform:category" tags and other attributes applied to offshore platforms.
| Object | S-100 | OSM Element | object key | IHO Definition |
|---|---|---|---|---|
| Offshore platform | OFSPLF | platform | A permanent offshore structure, either fixed or floating, used in the production of oil or natural gas. | |
Categories
Classification of an offshore raised structure.
| Category (CATOFP) | seamark:platform:category | Definition |
|---|---|---|
| Oil derrick/rig | oil | A temporary mobile structure, either fixed or floating, used in the exploration stages of oil and gas fields. |
| Production platform | production | A term used to indicate a permanent offshore structure equipped to control the flow of oil or gas. It does not include entirely submarine structures. |
| Observation/research platform | observation | A platform from which one's surroundings or events can be observed, noted or recorded such as for scientific study. |
| Articulated loading platform (ALP) | alp | A metal lattice tower, buoyant at one end and attached at the other by a universal joint to a concrete filled base on the sea bed. The platform may be fitted with a helicopter platform, emergency accommodation and hawser/hose retrieval. |
| Single anchor leg mooring (SALM) | salm | A rigid frame or tube with a buoyancy device at its upper end , secured at its lower end to a universal joint on a large steel or concrete base resting on the sea bed, and at its upper end to a mooring buoy by a chain or wire. |
| Mooring tower | mooring | A platform secured to the sea bed and surmounted by a turntable to which ships moor. |
| Artificial island | artificial_island | A man-made structure usually built for the exploration or exploitation of marine resources, marine scientific research, tidal observations, etc. |
| Floating production, storage and offloading vessel (FPSO) | fpso | An offshore oil/gas facility consisting of a moored tanker/barge by which the product is extracted, stored and exported. |
| Accommodation platform | accommodation | A platform used primarily for eating, sleeping and recreation purposes. |
| Navigation, communication and control buoy (NCCB) | nccb | A floating structure with control room, power and storage facilities, attached to the sea bed by a flexible pipeline and cables. |
Other Attributes
| Attribute (S-100) | seamark:platform:<attribute> | Value type | Definition |
|---|---|---|---|
| Colour (COLOUR) | colour | List | There is a set of standard colours defined in the S-100 attribute catalogue, see Seamarks/Colours#Colours. |
| Pattern (COLPAT) | colour_pattern | List | A painted platform with more than one colour can be specified by listing those colours in a semi-colon separated list, see Seamarks/Colours#Colour Patterns. |
| Nature of construction (NATCON) | construction | List | The platform's primary construction material, see Seamarks/General Attributes#Nature of construction (NATCON). |
| Condition (CONDTN) | condition | Enumeration | See Seamarks/General_Attributes#Condition_.28CONDTN.29 |
| Height (HEIGHT) | height | Decimal | The value of the vertical distance to the highest point of the platform, measured from a specified vertical datum (typically, mean sea level). Example: Highest point of platform is 28.5 m above MSL. Answer: seamark:platform:height=28.5.] |
| Product (PRODCT) | product | List | See Seamarks/General_Attributes#Product_.28PRODCT.29 |
| Conspicuous, radar (CONRAD) | reflectivity | Enumeration | Platform's ability to be detected by radar, see Seamarks/General_Attributes#Conspicuous.2C_radar_.28CONRAD.29 |
| Conspicuous, visually (CONVIS) | visibility | Enumeration | Platform's ability to be clearly seen and identified, see Seamarks/General_Attributes#Conspicuous.2C_visually_.28CONVIS.29 |
References
Seamark Tag Values
Seamark Objects
Seamark Attributes
INT-1 Cross Reference
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