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García-Herrera, Ricardo; Können, Gunther P; Wheeler, Dennis A; Prieto, Maria del Rosario; Jones, Philip D; Koek, Frits B (2010): Meteorological observations during SEAHORSE cruise from England to Madeira started at 1755-01-14. National Maritime Museum, Greenwich, United Kingdom, PANGAEA,, In: Jones, Philip D; Wheeler, Dennis A; Können, Gunther P; Koek, Frits B; Prieto, Maria del Rosario; García-Herrera, Ricardo (2007): Climatological observations from ship logbooks between 1750 and 1854 (release 2.1). PANGAEA,

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Related to:
García-Herrera, Ricardo; Können, Gunther P; Wheeler, Dennis A; Prieto, Maria del Rosario; Jones, Philip D; Koek, Frits B (2005): CLIWOC: A Climatological Database for the World's Oceans 1750-1854 (and 10 more publications about CLIWOC results in the same volume). Climatic Change, 73(1-2), 1-12ff,
Median Latitude: 43.746250 * Median Longitude: -11.430000 * South-bound Latitude: 40.000000 * West-bound Longitude: -12.750000 * North-bound Latitude: 49.650000 * East-bound Longitude: -9.860000
Date/Time Start: 1755-01-14T13:00:00 * Date/Time End: 1755-01-21T13:00:00
Seahorse_17550114_NMM_ADM/L/S218 * Latitude Start: 51.530000 * Longitude Start: 1.920000 * Latitude End: 32.130000 * Longitude End: -16.570000 * Date/Time Start: 1755-01-14T00:00:00 * Date/Time End: 1755-01-21T00:00:00 * Campaign: Cliwoc_cruise * Device: Underway cruise track measurements (CT) * Comment: Ship: Seahorse (6th Rate Frigate), Voyage: England - Madeira, 1st Observer: Hugh Palliser (Captain), 2nd Observer: John Hughes (1st Officer/Master), Company: Royal Navy, Other ship information: 24G. 504BM
#NameShort NameUnitPrincipal InvestigatorMethodComment
4Wind speedffm/scalculated from the descriptive terms of wind force given in the observations
5LandmarkLandmarkName of first landmark
6BearingBearingBearing of the first landmark
7Distance to landmarkDistancearbitrary unitsDistance to the first landmark
8CourseCourseCourse of the ship during the past 24 hours
9DistanceDistancearbitrary unitsDistance travelled during the previous 24 hours
10DeclinationDecldegIt is generally accepted by the CLIWOC team that the wind directions, reported by the ships officers, were relative to the magnetic North direction. Navigators were well aware of the difference between the true and magnetic north direction, but the compasses (we assumed that the bearing-compasses were mostly used for determining the wind direction) were not always adjusted. Therefore the wind direction has to be corrected. The magnetic declination (or variation, as it is known on board ships) is given for the whole CLIWOC period (1750-1850) for every 5x5 degree square. The number was added to the wind direction to get the true wind direction.
11Wind force descriptionWind force descrAll reported wind forces on this day
12Present weatherwwWeather description
14GustsGusts1 If wind gusts are reported
15Precipitation/RainRain1 If rain was reported
16FogFog1 If fog was reported
17Snow typeSnow1 If snow was reported
18ThunderThunder1 If thunder and or lightning was reported
19HailHail1 If hail was reported
20Sea iceSea ice1 If sea-ice or icebergs were reported
21IdentificationIDCLIWOC 2.1 line number
133 data points

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