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    "@id": "http://portal.medin.org.uk/portal/json-ld/Marine_Scotland_FishDAC_1712.jsonld",
    "identifier": "Marine_Scotland_FishDAC_1712",
    "url": "http://portal.medin.org.uk/portal/?details&tpc=Marine_Scotland_FishDAC_1712",
    "name": "1415S Mackerel Acoustic Survey_-Scotia Cruise 1415S",
    "description": "Daily folders (11) of Simrad format (.raw) acoustic data. 6 folders of Edgetech broadband acoustic data. Echoview mackerel detection template. PDF biological data for 6 pelagic hauls and rod and line deployments. Biological data in FSS database. CTD data for 6 vertical dips. Continual Thermosalinograph data. Continual AGDS data.\r\nOverall Objectives:\r\nTo estimate mackerel density and abundance in the area of the Shetland Isles. \r\nTo investigate the use of a broadband system as a means to determine mackerel size.\r\nTo study distribution of cetaceans and their relationship to mackerel shoals.\r\n\r\nSpecific Objectives:\r\nCalibration of Edgetech Broadband system.\r\nCalibrate Sv and TS gains on the Simrad EK60.\r\nObtain acoustic data from mackerel using the Edgetech broadband system.\r\nObtain biological samples of mackerel from schools by trawling.\r\nTrial deployment options for the Edgetech broadband system. \r\nObtain acoustic data from mackerel using the Simrad WBAT autonomous broadband system.\r\nCompare the echo returns from a low cost portable sounder system with those from the calibrated Simrad EK60 echo-sounder system.\r\nDeploy a lightweight AU Go-Pro camera system into the mackerel schools to observe behaviour.\r\nDeploy MSS Go-Pro system on PT160 net\r\nDeploy MSS Go-Pro lander system onto the sea bed to identify fish traces on un-trawlable ground.\r\nVisually observe marine mammal distribution and activity during daylight hours. \r\nObtain towed hydrophone acoustic recordings of mammal vocalisation during survey transects.\r\nCompare netsonde traces of mackerel in the net with those seen using the cable less Scanmar trawl eye system.",
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    "temporalCoverage": "2015-10-05/2015-10-16",
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            "name": "Biota composition"
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            "name": "Acoustic backscatter in the water column"
        },
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            "name": "Scottish Government (Marine Scotland)",
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        "description": "The MEDIN portal contains information about 19493 marine datasets from over 600 UK organisations. Metadata are an enduring resource and contact details are publicly available for a long time. \r\n\t\tPlease contact us (enquiries@medin.org.uk) if you find your contact details on the MEDIN portal and do not consent to this. \r\n\t\tYou can now use our GitHub repository to report issues or access related documents. Metadata records are updated daily and were last updated 2026-04-19. Record deletion takes place weekly and the latest occurred 2026-04-12."
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