--- title: "Waves and coastal buoys monitoring | Nexus Observatory" description: "Pilots, harbour masters, fishers, surfers and coastal engineers all need to know the waves. Moored buoys measure wave height…" url: https://observatory.global/industries/oceans/wave-buoys/ publisher: Nexus Observatory Inc. updated: 2026-11-02 --- [Nexus Observatory](https://observatory.global/) / [Oceans](https://observatory.global/industries/oceans/) / [Specialized fields](https://observatory.global/industries/oceans/fields/) / **Waves and coastal buoys** # Every wave off the coast, counted. Pilots, harbour masters, fishers, surfers and coastal engineers all need to know the waves. Moored buoys measure wave height, period and direction with wind and sea temperature, report every half hour by satellite or cellular, and keep the records that coastal designs are built on. [Plan a deployment](https://observatory.global/contact/deployment/) How it works [Station Builder](https://observatory.global/studio/builder/) **Industry**: Oceans **Measurements**: 4 **Sources cited**: 3 1. Oceans · Waves and coastal buoys Everyone at sea needs the waves Pilots bringing ships into port, harbour masters, fishers, surfers and coastal engineers all need to know the waves. Forecasts need observations to check them, and coastal designs need decades of records. Moored buoys provide both, if they survive the storms they exist to measure. 2. What is measured Height, period and direction Motion sensors on the buoy measure wave height, period and direction, and wind, pressure and sea surface temperature sensors measure the conditions around it. A satellite position on every report shows the buoy is still on its mooring. Every instrument keeps its calibration and position with the site record. InstrumentsWave motion sensor · Wind · Pressure · Sea temperature · Position 3. The base node Spectra at sea The node computes wave statistics and spectra on the buoy, applies the real-time quality checks for waves, watches its own position for signs of a mooring failure and sends compact reports, shedding non-essential sensors when power runs low in the darkest weeks. 4. Radio and links Cellular near port, satellite offshore Buoys near ports report over cellular, cheaply and often. Offshore buoys beyond coverage report through a satellite terminal. Reports reach forecasting systems, harbour systems and global marine data centres in their own formats. When one path fails, the other carries the data. LinksPublic cellular · Satellite 5. How it works From a swell to a closed bar A long swell from a distant storm arrives overnight. The buoy off the harbour entrance reports wave height and period rising above the pilots' limits for the bar. The harbour master closes the entrance to small craft and pilots reschedule arrivals until the swell eases. 6. From order to operation · Order Scope the coast The scope reads the coast's ports, navigation and design needs, existing buoys and the warnings that need wave data. Nexus Observatory Inc. returns the buoy plan, mooring designs, data and quality plan and a price per buoy and per year. [Plan a deployment](https://observatory.global/contact/deployment/) 7. From order to operation · Survey Survey the seabed Crews survey candidate positions for depth, seabed type for the anchor, exposure to the waves of interest, shipping lanes and fishing grounds, and coverage for reports. Mooring designs follow from depth and seabed. Findings shape the kit for each site before anything is built. 8. From order to operation · Permits Maritime consent and notices Buoys are approved by the maritime authority, marked and lit to the rules for their area, and published in notices to mariners. Fishing communities are told of positions. Every approval is kept with the buoy record. No crew goes to site before its approvals are in place. 9. From order to operation · Build Build and test on land Buoys are assembled with sensors, node, power and terminal, calibrated, enrolled with their identities and run on land for days. Moorings are built to the design for each position and inspected. Nothing ships until the whole kit has passed its tests together. [Open the Station Builder](https://observatory.global/studio/builder/) 10. From order to operation · Install Deploy from a vessel Crews deploy each buoy and its mooring from a vessel at the surveyed position, record the anchor position, and watch the first reports arrive before leaving. Every step is photographed. Crews follow the site safety plan throughout the work. The site record is updated before the crew leaves. 11. From order to operation · Commission Commission against a reference Each node proves its identity. Waves are compared with a reference buoy or model over the first weeks, wind and temperature with nearby stations, and quality flags are checked. The buoy enters service when checks pass. Acceptance is recorded with the owner before handover. 12. From order to operation · Operate Report every half hour Pilots, harbour masters and forecasters see waves, wind and temperature every half hour. Coastal engineers receive the long record with its flags, and drift alerts send a vessel at once if a mooring fails. Every alert and action is kept on the record. 13. From order to operation · Maintain Swap and refurbish Buoys are swapped with refurbished ones on the agreed plan, sensors cleaned of fouling and recalibrated, moorings inspected and replaced, and software updated remotely. Every change is kept with the buoy record. Maintenance history stays with each site for its whole life. [Book field services](https://observatory.global/contact/field-service/) 14. Data products For pilots, engineers and coastguards Pilots, harbour masters and forecasters receive waves, wind and temperature; coastal engineers and designers receive long wave records; coastguards and beach services receive dangerous sea alerts; buoy operators receive drift alerts, each tied to buoy, position and time. Every product can be traced back to its readings. [See the data products](https://observatory.global/data-products/) 15. Evidence Quality-controlled waves Wave data pass the real-time quality checks for in-situ surface waves, marine observations follow the WMO instrument guide, and sea state and sea surface temperature are reported as essential climate variables. Every report keeps its flags, position and calibration record. Drawn againstManual for Real-Time Quality Control of In-Situ Surface Wave Data · WMO-No. 8 · GCOS-244 16. What you get Ocean and coastal observing Moored buoys, profiling floats, tide and wave gauges, coastal radar and AIS reception with quality-controlled feeds. Delivered as managed service and data licence, for ports, coastal agencies, offshore energy, fisheries. Scale: Coastline to basin. Service levels are written as numbers you can measure on your own dashboard. [Talk to sales](https://observatory.global/contact/sales-enquiry/) 17. Next step Plan waves and coastal buoys with us Tell us the site, the measurements and the rules it answers to. We reply with a survey proposal, a design and a scope for waves and coastal buoys. An engineer replies with a survey proposal and a scope, and the plan grows from one site to the network you need, at your pace. [Plan a deployment](https://observatory.global/contact/deployment/) [Open the Station Builder](https://observatory.global/studio/builder/) [Open the Studio](https://observatory.global/studio/) **01** The place and its hazards ## Where it runs, and what can go wrong. Operating contextWave data are quality-controlled to the real-time manual for in-situ surface waves, marine observations follow the WMO instrument guide, and sea state and sea surface temperature are essential climate variables. Buoys must survive storms, fouling, vandalism and passing ships. Hazards - Buoys that break their moorings in storms - Fouling that degrades sensors - Collisions with vessels - Data gaps in the storms that matter most - Wave data without quality control **02** What must be measured ## What, where, how often, and under which rules. Each measurement names where it is taken, how often, and the public standard or regulation behind it. Numbers in the sources column open the cited source below. | Measurement | Where | Cadence | Sources | | --- | --- | --- | --- | | Wave height, period and direction | Motion sensors on moored buoys | Every half hour, with spectra | 12 | | Wind and air pressure | Sensors on the buoy mast | Every ten minutes | 3 | | Sea surface temperature | Sensors in the hull | Every ten minutes | 32 | | Buoy position and mooring health | Satellite position on the buoy | Every report, alert on drift | 1 | **03** The observation stack ## From one base unit to a network. The same blocks at every scale: instruments and a base node, a site with its radio, a fleet run as one, and a network federated on the open protocol. 1. **01** Base unit A buoy: wave motion, wind, pressure and temperature sensors on a small node with its own power. [Build a station →](https://observatory.global/studio/builder/) 2. **02** Site A site: the moored buoy, its mooring and anchor, and the shore station receiving its reports. [Plan a site →](https://observatory.global/contact/deployment/) 3. **03** Fleet A network of buoys along a coast run to one quality plan. [Managed offers →](https://observatory.global/industries/oceans/solutions/) 4. **04** Network Buoy data are shared with weather services and global marine data centres through open standards. [The open protocol →](https://observatory.global/protocol/) - **01** Moored buoy - **02** Compact weather station - **03** Water quality sonde - **04** Micro node (Nano) - **05** 3GPP NTN terminal - **06** Cellular modem/router - **07** Solar array Radio and links ### Public cellular Buoys near ports report over cellular, cheaply and often. Radio and links ### Satellite Offshore buoys beyond coverage report through a satellite terminal. Edge computeThe node computes wave statistics and spectra on the buoy, applies the real-time quality checks, watches the buoy's position for mooring failure and sends compact reports. PowerSolar panels and batteries on the buoy, sized for the darkest weeks; the node sheds non-essential sensors when power is short. **04** How it works ## From the instrument to the product. One observation's path, tier by tier, with the interface on every link and a bill of materials below; then how the one node grows to a site, a fleet and federated networks. Waves and coastal buoys: data path – of 06 01 Instruments Measurement with sensor identity andcalibration 02 Node – Wrap in an observation envelope with timequality– Measure quality and uncertainty, attachquality flags– Buffer locally (store-and-forward when thelink drops) 03 Backhaul Commit with transactional outbox andpublish, delivered at least once 04 Site Consumer inbox deduplicates and applieseach record once into governed data 05 Data store Governed product through API, map orexport, correction-aware 06 Products WMO WIS 2.0netCDF-CFOGC SensorThings API 07 Power and structure Supplies 12 V DC to the field equipment 01 Moored buoy RS-485 · SDI-12 02 Compact weather station SDI-12 · RS-485 · Ethernet 03 Water quality sonde SDI-12 · RS-485 · Ethernet 04 Micro node (Nano) Ethernet · USB · Analogue I/O ·RS-485 · CAN 05 3GPP NTN terminal Ethernet · USB · RS-232 06 Cellular modem/router Ethernet · USB · RS-232 Site MQTT 5 with Sparkplug B Governed data store Versioned, correction-aware Waves, wind and temperature Long wave records Dangerous sea alerts Drift alerts 07 Solar array RS-485 RS-485 RS-485 RS-485 Ethernet Ethernet 3GPP NTN LTE/NR From the instrument to the published product: each band is a tier, each connector names its interface, and the numbers match the bill of materials. Hover or focus a block to trace its path; scroll or step to follow one observation. | Item | Equipment | Data ports | Protocols | Power in | | --- | --- | --- | --- | --- | | 01 | **Moored buoy** Moored buoy platform carrying met-ocean sensors, with solar power and satellite or cellular telemetry. | RS-485SDI-12 | MQTT 5, OGC SensorThings API | 12 V DC | | 02 | **Compact weather station** All-in-one or compact station for temperature, humidity, pressure, wind and rain at a site. | SDI-12RS-485Ethernet | SDI-12, Modbus, MQTT 5, OGC SensorThings API | 12 V DC | | 03 | **Water quality sonde** Multi-parameter sonde for temperature, conductivity, pH, dissolved oxygen and turbidity. | SDI-12RS-485Ethernet | SDI-12, Modbus, MQTT 5, OGC SensorThings API | 12 V DC | | 04 | **Micro node (Nano)** Single-board or module-class node for sensor sites, gateways and low-power deployments. | EthernetUSBAnalogue I/ORS-485CAN | MQTT 5, OMA LwM2M, CoAP | PoE, 12 V DC, USB PD | | 05 | **3GPP NTN terminal** Terminal using the 3GPP non-terrestrial network air interface (NR-NTN or IoT-NTN) to reach a satellite access node directly. | EthernetUSBRS-232 | 3GPP NR or IoT NTN, OMA LwM2M, MQTT 5 | 12 V DC, Internal battery | | 06 | **Cellular modem/router** LTE or NR modem or router that uses a public carrier or private network as backhaul. | EthernetUSBRS-232 | 3GPP E-UTRA air interface, 3GPP NR air interface, OMA LwM2M | 12 V DC, PoE | | 07 | **Solar array** PV modules with charge controller sized to the site's load and climate. | RS-485 | Modbus | — | How it scales 01 Instruments Arbitrary qualified sensors and instruments whosemeasurements are ingested with calibration, units,geometry, time, custody and uncertainty. ×n 02 Node The minimum useful deployable unit: server, ruggedappliance, radio node, sensor gateway, satelliteterminal, AI, scientific, vehicle or virtual node. Node Node agent 03 Site The minimum independently operable localgovernance and failure domain: one or more nodesplus local network, identity, policy, evidence,storage, products and operator surfaces. SITE Node Node Node ×n 04 Cluster An optional scale or specialisation domain forscheduling, shared storage, accelerators or datalocality. CLUSTER ×n 05 Fleet Coordinates plans, acknowledgements,convergence evidence, update campaigns andcorrection propagation across nodes and sites. FLEET Fleet controller ×n 06 Federation An exchange of products, capabilities, events orwork across approved, independently administeredtrust domains, using explicit trust, policy,data-locality, version and correction contracts. TRUST DOMAIN TRUST DOMAIN TRUST DOMAIN ×n Verifier Applications Data in the field Telemetry Control Data upstream Control Data upstream Control Exchange Evidence Events Exchange The smallest deployable unit is one node; the same unit is replicated to meet the demand. Nodes form a site, sites may form a cluster, sites and clusters are coordinated as a fleet, and fleets exchange across independently administered trust domains. Each plane is a separate channel with its own open binding. **Data in the field**: MQTT 5 with Sparkplug B; connectors for LoRaWAN, OPC UA and instrument buses. **Telemetry**: OpenTelemetry OTLP. **Control**: TLS 1.3 with mutual authentication; protobuf messages over gRPC or HTTP/2. **Data upstream**: At-least-once publication with repeat-safe keys over the control channel or NATS JetStream; QUIC MAY be used on lossy links. **Evidence**: DSSE-signed in-toto statements; SLSA provenance; SCITT transparency receipts. **Events**: Event envelopes mapped to CloudEvents 1.0; channels described in AsyncAPI 3. **Exchange**: OpenAPI 3.1; the OGC API family; SensorThings; STAC; WIS 2.0. **05** From order to operation ## Every step, from the first call to a running site. The same crew and the same record carry the work from scope to maintenance. 1. 01 Order Scope the coast The scope reads the coast's ports, navigation and design needs, existing buoys and the warnings that need wave data. Nexus Observatory Inc. returns the buoy plan, mooring designs, data and quality plan and a price per buoy and per year. 1 2. 02 Survey Survey the seabed Crews survey candidate positions for depth, seabed type for the anchor, exposure to the waves of interest, shipping lanes and fishing grounds, and coverage for reports. Mooring designs follow from depth and seabed. Findings shape the kit for each site before anything is built. 3. 03 Permits Maritime consent and notices Buoys are approved by the maritime authority, marked and lit to the rules for their area, and published in notices to mariners. Fishing communities are told of positions. Every approval is kept with the buoy record. No crew goes to site before its approvals are in place. 4. 04 Build Build and test on land Buoys are assembled with sensors, node, power and terminal, calibrated, enrolled with their identities and run on land for days. Moorings are built to the design for each position and inspected. Nothing ships until the whole kit has passed its tests together. 5. 05 Install Deploy from a vessel Crews deploy each buoy and its mooring from a vessel at the surveyed position, record the anchor position, and watch the first reports arrive before leaving. Every step is photographed. Crews follow the site safety plan throughout the work. The site record is updated before the crew leaves. 6. 06 Commission Commission against a reference Each node proves its identity. Waves are compared with a reference buoy or model over the first weeks, wind and temperature with nearby stations, and quality flags are checked. The buoy enters service when checks pass. Acceptance is recorded with the owner before handover. 13 7. 07 Operate Report every half hour Pilots, harbour masters and forecasters see waves, wind and temperature every half hour. Coastal engineers receive the long record with its flags, and drift alerts send a vessel at once if a mooring fails. Every alert and action is kept on the record. 2 8. 08 Maintain Swap and refurbish Buoys are swapped with refurbished ones on the agreed plan, sensors cleaned of fouling and recalibrated, moorings inspected and replaced, and software updated remotely. Every change is kept with the buoy record. Maintenance history stays with each site for its whole life. **06** Data products and integration ## What it delivers, to whom, and into which systems. Data products - **Waves, wind and temperature** Pilots, harbour masters and forecasters - **Long wave records** Coastal engineers and designers - **Dangerous sea alerts** Coastguards and beach services - **Drift alerts** Buoy operators Integration - **Weather services** Reports reach forecasting systems in their formats. - **Harbour systems** Waves and wind feed pilotage and harbour planning. - **Global data centres** Records are shared with marine data centres. Exchanged through WMO WIS 2.0, netCDF-CF, OGC SensorThings API. **07** Questions buyers ask ## Before you scope it. How long does a buoy stay out? Until its planned swap, typically a season or more. What if it breaks free? Drift alerts send a vessel at once. Is the data quality controlled? Yes, with the real-time wave checks. Can it measure water quality? Sensors can be added to the hull. **08** Resources ## The sources behind this page. Public standards, regulations and guidance, cited where they apply. Each applies only where its jurisdiction or scope does. 1. **1** [Manual for Real-Time Quality Control of In-Situ Surface Wave Data (QARTOD)](https://ioos.noaa.gov/) U.S. Integrated Ocean Observing System 2. **2** [GCOS-244: The 2022 GCOS Implementation Plan](https://gcos.wmo.int/) Global Climate Observing System · 2022 3. **3** [WMO-No. 8: Guide to Instruments and Methods of Observation](https://library.wmo.int/) World Meteorological Organization **09** Related ## Use cases and solutions. [Use case Wave buoy coastal arrayLow-cost moored wave buoys with satellite telemetry, deployed as an array along a coast or port approach.The full use case →](https://observatory.global/use-cases/wave-buoy-array/) [Solution Ocean and coastal observingMoored buoys, profiling floats, tide and wave gauges, coastal radar and AIS reception with quality-controlled feeds.Solutions for oceans →](https://observatory.global/industries/oceans/solutions/#ocean-coastal) [Solution Satellite and non-terrestrial backhaulLEO and GEO backhaul, 3GPP non-terrestrial integration and direct-to-device fallbacks for remote sites.Solutions for oceans →](https://observatory.global/industries/oceans/solutions/#ntn-backhaul) [Solution Observation data products and evidence bundlesLicensed feeds and archives with metadata, quality flags and provenance on every value; evidence bundles for audits and claims processes.Solutions for oceans →](https://observatory.global/industries/oceans/solutions/#observation-data) **10** Oceans: specialized fields ## Other fields of this industry. [Specialized field Sea level and storm surgeTide gauges with land-motion GNSS and weather at harbours and coasts, giving real-time surge for warnings and long sea-level records tied to the land they stand on.The full field →](https://observatory.global/industries/oceans/sea-level/) [Specialized field Coastal and bathing water qualitySondes and samplers at beaches, estuaries and aquaculture zones that watch temperature, oxygen, turbidity and algal blooms, so authorities protect bathers and shellfish in time.The full field →](https://observatory.global/industries/oceans/coastal-water-quality/) [Specialized field Underwater noiseHydrophone moorings that measure ship noise, piling and other sound in the sea, for marine protection duties, offshore construction and the animals that depend on hearing.The full field →](https://observatory.global/industries/oceans/underwater-noise/) ### Bring us the site. Plan a deployment, configure a station, model it in the Studio or talk to sales. 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