Carrier Vessel Portal Archives - Global Fishing Watch Publicly sharing knowledge about human activity at sea Wed, 12 Nov 2025 18:45:29 +0000 en-US hourly 1 https://wordpress.org/?v=6.8.3 https://globalfishingwatch.org/wp-content/uploads/cropped-gfwisologo512x512-1-1-32x32.png Carrier Vessel Portal Archives - Global Fishing Watch 32 32 What is a carrier vessel? https://globalfishingwatch.org/faqs/what-is-a-carrier-vessel/ Mon, 27 Jul 2020 18:41:40 +0000 https://globalfishingwatch.org/?post_type=ht_kb&p=11250 A carrier vessel is a type of vessel used to transport fish, supplies, and crew to and from fishing vessels, allowing fishing vessels to stay out at sea for longer periods of time. A carrier vessel can receive catch, or ‘tranship’, from one or more fishing vessels at sea or in port and then offload […]

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]]> What data is used to create the carrier vessel portal? https://globalfishingwatch.org/faqs/what-data-is-used-to-create-the-carrier-vessel-portal/ Mon, 27 Jul 2020 18:41:24 +0000 https://globalfishingwatch.org/?post_type=ht_kb&p=11252 The data in the portal is created using automatic identification system (AIS) data. AIS transmits a ship’s position so that others can be made aware of its location and avoid potential collision. AIS transmits a ship’s location, speed, direction, and identity information, such as a vessel’s name and flag. Global Fishing Watch uses AIS data […]

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]]> How current is the data in the carrier vessel portal? https://globalfishingwatch.org/faqs/how-current-is-the-data-in-the-carrier-vessel-portal/ Mon, 27 Jul 2020 18:41:07 +0000 https://globalfishingwatch.org/?post_type=ht_kb&p=11254 The data in the portal currently spans from January 2017 until 72 hours ago. We adjusted our authorization categories to enable the inclusion of the most recent month of data. Although all of our AIS data is provided until 72 hours ago, the registry records are updated at the beginning of each month with a […]

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]]> Does the carrier vessel portal show all carrier vessels operating on the world’s ocean? https://globalfishingwatch.org/faqs/does-the-carrier-vessel-portal-show-all-carrier-vessels-operating-on-the-worlds-ocean/ Mon, 27 Jul 2020 18:40:53 +0000 https://globalfishingwatch.org/?post_type=ht_kb&p=11256 The portal displays all carrier vessels demonstrating possible transshipment activity, including encounters and loitering events, with a fishing vessel. It also shows the fishing vessels, or donor vessels, involved in these encounters.

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]]> How is the authorization data in the carrier vessel portal identified? https://globalfishingwatch.org/faqs/how-is-the-authorization-data-in-the-carrier-vessel-portal-identified/ Mon, 27 Jul 2020 18:40:18 +0000 https://globalfishingwatch.org/?post_type=ht_kb&p=11260 The authorization data is retrieved from public sources regarding both current and historic registration of vessels to seven regional fisheries management organizations (RFMOs), including the five main tuna RFMOs: Commission for the Conservation of Southern Bluefin Tuna (CCSBT) Inter-American-Tropical-Tuna Commission (IATTC) International Commission for the Conservation of Atlantic Tunas (ICCAT) Indian Ocean Tuna Commission (IOTC) […]

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]]> What are the main carrier vessel portal functions? https://globalfishingwatch.org/faqs/what-are-the-main-carrier-vessel-portal-functions/ Mon, 27 Jul 2020 18:40:01 +0000 https://globalfishingwatch.org/?post_type=ht_kb&p=11262 The portal provides greater transparency into the activities of carrier vessels, their authorizations, the regions and ports they most frequent and, to the greatest extent possible, insight into the interactions between fishing vessels and carrier vessel fleets. The portal provides users with the ability to access information or conduct activities such as: View a comprehensively […]

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]]> What is a loitering event? https://globalfishingwatch.org/faqs/what-is-loitering-event/ Mon, 27 Jul 2020 18:39:24 +0000 https://globalfishingwatch.org/?post_type=ht_kb&p=11266 Loitering is when a single vessel exhibits behavior indicative of a potential encounter event. Loitering is estimated using automatic identification system (AIS) data, including vessel speed, duration in a given location, and distance from shore. Loitering occurs when a vessel travels at average speed of < two knots, while at least an average of 20 […]

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]]> How are port visits in the carrier vessel portal defined? https://globalfishingwatch.org/faqs/how-are-port-visits-in-the-carrier-vessel-portal-defined/ Mon, 27 Jul 2020 18:39:01 +0000 https://globalfishingwatch.org/?post_type=ht_kb&p=11268 Ports in the portal are based upon the Global Fishing Watch anchorages dataset, a global database of anchorage locations where vessels congregate. The dataset contains over 160,000 individual anchorage locations, which are further grouped into nearly 32,000 ports. A vessel is considered to have visited a port when within three kilometers of an anchorage location […]

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]]> Who will benefit from the carrier vessel portal? https://globalfishingwatch.org/faqs/who-will-benefit-from-the-carrier-vessel-portal/ Mon, 27 Jul 2020 18:38:45 +0000 https://globalfishingwatch.org/?post_type=ht_kb&p=11270 This global, public database and monitoring portal of carrier vessels involved in transshipment to help arm relevant authorities – from fishery managers to policymakers – with the information and evidence needed to strengthen transparency and accelerate transshipment policy reform, notably within the five global tuna regional fisheries management organizations where policy action has historically been […]

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]]> What is a vessel encounter? https://globalfishingwatch.org/faqs/what-is-a-vessel-encounter/ Thu, 15 Jul 2021 16:30:20 +0000 https://globalfishingwatch.org/?post_type=ht_kb&p=22189 Overview Encounter events identify instances where two vessels appear to meet at sea. Global Fishing Watch classifies an event as an encounter when two vessels are detected: Within 500 meters of one another For a duration of at least 2 hours Traveling at a median speed of less than 2 knots And located at least […]

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