# Port Call Patterns: Forecasting Marine Service Demand > Learn how to read port call patterns to forecast demand for marine services, from arrival prediction research to segment-level volumes for chandlers and yards. URL: https://vesselreach.si/blog/port-call-patterns-forecasting-marine-service-demand | Published: 2026-10-21 | Guide | Topic: Finding port-call opportunities Port call patterns are the repeating record of which vessel types call at a port, when, and for how long. Reading those patterns lets a chandler, bunker supplier, agent or repair yard forecast demand for marine services before the enquiry arrives. Forecasting from port call patterns means counting arrivals by vessel type, size and season, then matching that mix to the services each ship needs. As [Hellenic Shipping News](https://www.hellenicshippingnews.com/a-complete-guide-to-port-calls/) put it in October 2026, a port call is a berth booking to a port authority and a service opportunity to a ship agent. ## What counts as a port call pattern? A port call pattern is a repeatable combination of vessel type, arrival window, dwell time and service need at one port. It is a forecast, not a single AIS blip. - **Vessel mix:** bulkers, tankers, container ships, cruise and expedition vessels, offshore support vessels. - **Arrival rhythm:** weekly liner loops against irregular tramp calls. - **Dwell time:** hours at anchorage versus days alongside for repairs. - **Service signature:** stores, bunkers, fresh water, spares, husbandry, dry-dock work. A port that handles tankers on a two-week cycle needs a different stock and staffing plan from one that takes expedition cruise calls a few times a year. ## Why historical schedules alone mislead you Published schedules are a weak forecast of when a ship actually arrives. A 2024 study in *IEEE Sensors Journal* built a model to predict ship arrival time at anchorage from AIS data and trajectory inflection points. Its average prediction error was 30 minutes, against an average error of 2.75 days when using ship schedule data ([IEEE Sensors Journal](https://doi.org/10.1109/jsen.2024.3370605)). For a supplier, that gap is the difference between preparing a delivery and reacting to a vessel already at anchor. Port call patterns built on observed movements beat patterns built on published ETAs. ## Building the forecast in four steps Start with observed arrivals at your own port, then layer the segment data you already hold. 1. **Collect 12 to 24 months of arrivals.** Group by vessel type, DWT band, IMO number and berth. Note repeat callers separately from first-time callers. 2. **Cluster the patterns.** A 2013 study in *Entropy* showed that AIS data can be used to infer contextual information from the characterisation of ports to the spatial and temporal distribution of routes ([Entropy](https://doi.org/10.3390/e15062218)). In practice, this means grouping calls by route and vessel behaviour rather than by calendar month alone. 3. **Convert patterns into service volumes.** Multiply expected calls by the typical order size for that vessel type. A geared bulk carrier on a short call needs stores and fresh water; a tanker needs bunkers and possibly sampling. 4. **Adjust for known shifts.** Route changes, new services and security events all reset the baseline. Volume prediction itself is an active research field: a 2020 study in *IEEE Access* improved a fuzzy neural network with a quantum genetic algorithm to predict vessel traffic volume at an actual Chinese port ([IEEE Access](https://doi.org/10.1109/access.2020.2982904)). You do not need the algorithm to benefit from the principle: use observed traffic, not intuition. ## Read the route changes that reset your baseline A service change can move hundreds of calls out of one port and into another within a single loop rotation. In October 2026, Gemini Cooperation partners Maersk and Hapag-Lloyd relaunched their Far East-Middle East loop but dropped the Jebel Ali call ([The Loadstar](https://theloadstar.com/gemini-to-relaunch-asia-middle-east-loop-but-drops-jebel-ali-call/)). For a Jebel Ali supplier, that is a direct reduction in expected container ship calls. For a supplier at the substitute port, it is new volume with no historical pattern behind it. Cargo flows move the same way. Brazil's soybean oil exports reached about 1.57 million metric tons from January to August, exceeding shipments for the whole of 2025, according to [Hellenic Shipping News](https://www.hellenicshippingnews.com/brazil-soybean-oil-exports-rise-as-conab-forecasts-record-2026-27-soybean-crop/) (October 2026). Rising liquid bulk exports translate into more tanker calls at the loading terminals, and more demand for bunkers, sampling and husbandry there. ## Segment the forecast by service line One port-level number hides the differences that matter commercially. Forecast each service line separately. Service linePort call signal to trackWho to contact Ship chandlingRepeat callers, short dwell, geared bulkersTechnical superintendent, purchasing BunkeringTanker and container calls, longer alongside timeChartering, fleet operations Port agencyFirst-time callers, cruise and expedition callsOperations, port operations Repair and dry-dockExtended stays, older tonnage, class surveysTechnical manager, DOC holder Cruise and expedition calls are a good example of a pattern that looks small but carries high spend per call. The Port of Ipswich welcomed its largest-ever cruise visit when Hapag-Lloyd Cruises' HANSEATIC spirit arrived on 3 October 2026, according to Marine Insight. A single call like that can carry provisions, fresh water and shore services far beyond a standard cargo call. ## Turn the forecast into pre-arrival conversations A forecast only earns money when it reaches the right person before the vessel berths. That means matching each predicted call to the company behind the vessel and the role that buys your service. Two practical habits help. First, track expected arrivals rather than only actual ones, so outreach starts days ahead. Second, keep the contact history attached to the vessel and the company, so a repeat caller is never treated as a cold lead. Security and regulatory shifts belong in the same forecast. Bulgaria has called for EU, NATO, Turkey and Romanian support as the security situation in the Black Sea deteriorated, according to The Maritime Executive (October 2026). Suppliers at affected ports should expect call patterns, insurance costs and lead times to move together. ## How VesselReach helps VesselReach, built by CatalystIQ, turns port call patterns into targeted conversations with the people who buy marine services. - **Vessel intelligence on selected ports:** see vessels near your ports and vessels scheduled or expected to arrive, which means your team starts outreach before the berth window opens. - **AI company targeting and decision-maker discovery:** VesselReach identifies the relevant company behind each vessel and finds roles such as technical superintendents, purchasing and fleet operations, which means your forecast reaches a named buyer. - **Staged multichannel outreach with automated follow-ups:** email, WhatsApp and phone outreach runs in sequence with follow-ups, which means repeat callers and new arrivals both get timely, relevant contact. Book a VesselReach demo to see how vessel arrivals at your ports become qualified sales opportunities. ## Frequently asked questions ### How do I forecast demand for marine services from port call patterns? Collect 12 to 24 months of observed arrivals at your port, group them by vessel type, size and berth, then multiply expected calls by typical order size per vessel type. Adjust the baseline whenever a liner service or trade flow changes route. ### Why are published ship schedules unreliable for supplier planning? A 2024 study in IEEE Sensors Journal found AIS-based arrival prediction averaged a 30-minute error, against an average 2.75-day error using ship schedule data. Observed movements give suppliers a far tighter window for preparing deliveries. ([IEEE Sensors Journal](https://doi.org/10.1109/jsen.2024.3370605)) ### Which port call signals matter most for ship chandlers? Repeat callers, short dwell times and geared bulk carriers are the strongest chandling signals. Matching those calls to the technical superintendent or purchasing contact at the managing company turns a pattern into a pre-arrival enquiry. ### How does a liner service change affect supplier demand? It can move large volumes of calls between ports within one loop rotation. When Gemini Cooperation relaunched its Far East-Middle East loop and dropped the Jebel Ali call in October 2026, expected container ship calls at that port fell accordingly. ([The Loadstar](https://theloadstar.com/gemini-to-relaunch-asia-middle-east-loop-but-drops-jebel-ali-call/)) ### How can maritime businesses act on port call forecasts before vessels arrive? VesselReach detects vessels near your selected ports and expected arrivals, identifies the company behind each vessel and the relevant decision-makers, then runs staged email, WhatsApp and phone outreach so your team contacts buyers before the vessel berths. ## Sources 1. [Prediction of Vessel Traffic Volume in Ports Based on Improved Fuzzy Neural Network](https://doi.org/10.1109/access.2020.2982904), IEEE Access, 2020-01-01 2. [Vessel Pattern Knowledge Discovery from AIS Data: A Framework for Anomaly Detection and Route Prediction](https://doi.org/10.3390/e15062218), Entropy (Multidisciplinary Digital Publishing Institute), 2013-06-04 3. [Research of AIS Data-Driven Ship Arrival Time at Anchorage Prediction](https://doi.org/10.1109/jsen.2024.3370605), IEEE Sensors Journal, 2024-03-18 4. [A complete guide to port calls](https://www.hellenicshippingnews.com/a-complete-guide-to-port-calls/), Hellenic Shipping News, 2026-10-16 5. [Brazil soybean oil exports rise as Conab forecasts record 2026-27 soybean crop](https://www.hellenicshippingnews.com/brazil-soybean-oil-exports-rise-as-conab-forecasts-record-2026-27-soybean-crop/), Hellenic Shipping News, 2026-10-19 6. [Bulgaria Calls for EU, NATO, Turkey and Romania to Aid Black Sea Security](https://maritime-executive.com/article/bulgaria-calls-for-eu-nato-turkey-and-romania-to-aid-black-sea-security), The Maritime Executive, 2026-10-13 7. [Gemini to relaunch Asia-Middle East Loop, but drops Jebel Ali call](https://theloadstar.com/gemini-to-relaunch-asia-middle-east-loop-but-drops-jebel-ali-call/), The Loadstar, 2026-10-13 ## More on this topic Port call patterns are the repeatable record of which vessels call at a port, when and for how long. Reading them lets a chandler, bunker supplier, agent or repair yard forecast demand for marine services before the enquiry lands. Start with 12 to 24 months of observed arrivals, group them by vessel type and berth, then match each group to the services that vessel needs. Research in IEEE Sensors Journal shows AIS-based arrival prediction is far tighter than published schedules, so build the forecast on observed movements. Route changes, such as a dropped Jebel Ali call, reset the baseline, and rising export volumes add tanker calls at loading terminals. Forecast each service line separately, then reach the buyer before the berth window opens. --- VesselReach, built by CatalystIQ. CatalystIQ Data Classification and Analysis Services, Al Qusais, Dubai, P.O. Box 129882, United Arab Emirates. info@catalystiq.ae, +971 58 599 7894. Book a demo: https://vesselreach.si/#demo. Pricing: contact us for a quote (https://vesselreach.si/pricing).