/* DATA DESCRIPTION:
Citation:	Burkhardt, Elke (2026): Whale sightings during POLARSTERN cruise ANT-XXIX/6 (PS81) [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.992897
Abstract:	Data on whale distribution and abundance in the polar oceans is rather sparse, as implementing the standard surveying method, line-transect surveys, is challenging and costly. To overcome this problem, we initiated a program to electronically log all opportunistic cetacean sightings during all Polarstern expeditions through the nautical officer on watch. Opportunistic (visual) sightings by naked eye were logged during Polarstern Cruise ANT-XXIX/6 (Cape Town – Punta Arenas) by the nautical officer on duty using a customized Software package (WALOG, WhAleLOGger) installed on a touch screen laptop located on the ship's bridge. Species were identified by naked eye or handheld binoculars (7x50) to the lowest possible taxonomical level and assigned a "certainty" level of identification. The number of animals were counted if possible or estimated for larger groups. Whenever identification to species level was not possible, the next identifiable taxonomical category was assigned. Information on sighting position, date and time are automatically transferred from the ship's DAVIS-Ship System (https://dship.awi.de/) to the WALOG software at the time of logging. Photographs were taken, if possible, for retrospective analysis. All data of acquired sightings were retrospectively validated by a marine biologist and converted to a standard format. To this end, plausibility of sighting time, location, standardization of species names, eventual comments added at the time of sighting, as well as additional information such as photographs (if available) were checked either to verify or improve species identification. Datasets are used in species distribution modelling and to inform interested parties about occurrences.
Keyword(s):	Cetacean sightings; WALOG
Documentation:	Information for MAPS whale sighting data (2018-12-18). hdl:10013/epic.24d813e7-0158-4fc3-bc99-0f4ebb6beecc
Project(s):	Marine Mammal Perimeter Surveillance from RV Polarstern (MAPS)
Coverage:	MEDIAN LATITUDE: -64.535183 * MEDIAN LONGITUDE: -19.752593 * SOUTH-BOUND LATITUDE: -68.030680 * WEST-BOUND LONGITUDE: -55.699750 * NORTH-BOUND LATITUDE: -56.756780 * EAST-BOUND LONGITUDE: 0.016720
	DATE/TIME START: 2013-06-15T09:46:53 * DATE/TIME END: 2013-08-11T19:17:48
Event(s):	PS81/6-track * LATITUDE START: -33.911860 * LONGITUDE START: 18.434600 * LATITUDE END: -53.144700 * LONGITUDE END: -70.909100 * DATE/TIME START: 2013-06-08T00:00:00 * DATE/TIME END: 2013-08-12T00:00:00 * LOCATION: Weddell Sea * CAMPAIGN: ANT-XXIX/6 (PS81 AWECS) * BASIS: Polarstern (URI: https://doi.org/10.17815/jlsrf-3-163) * METHOD/DEVICE: Underway cruise track measurements (CT)
Comment:	Date/Time is given in UTC. Certainty of identification: definite if observer clearly identified the species. The number of individuals is binned according to the options given in the data acquisition software: 1, 2, 3, less equal 5, less equal 10, greater than 10, greater than 20. More precise values may exist, due to observer comments.
Parameter(s):	DATE/TIME (Date/Time) * GEOCODE * PI: Burkhardt, Elke (https://orcid.org/0000-0002-5128-4176, Elke.Burkhardt@awi.de, https://www.awi.de/en/about-us/organisation/staff/single-view/elke-burkhardt.html)
	LATITUDE (Latitude) * GEOCODE * PI: Burkhardt, Elke (https://orcid.org/0000-0002-5128-4176, Elke.Burkhardt@awi.de, https://www.awi.de/en/about-us/organisation/staff/single-view/elke-burkhardt.html)
	LONGITUDE (Longitude) * GEOCODE * PI: Burkhardt, Elke (https://orcid.org/0000-0002-5128-4176, Elke.Burkhardt@awi.de, https://www.awi.de/en/about-us/organisation/staff/single-view/elke-burkhardt.html)
	Whale species (Whale) * PI: Burkhardt, Elke (https://orcid.org/0000-0002-5128-4176, Elke.Burkhardt@awi.de, https://www.awi.de/en/about-us/organisation/staff/single-view/elke-burkhardt.html) * METHOD/DEVICE: Visual inspection
	Certainty of identification (Certainty) * PI: Burkhardt, Elke (https://orcid.org/0000-0002-5128-4176, Elke.Burkhardt@awi.de, https://www.awi.de/en/about-us/organisation/staff/single-view/elke-burkhardt.html)
	Individuals [#] (Ind) * PI: Burkhardt, Elke (https://orcid.org/0000-0002-5128-4176, Elke.Burkhardt@awi.de, https://www.awi.de/en/about-us/organisation/staff/single-view/elke-burkhardt.html) * METHOD/DEVICE: Visual inspection
License:	Creative Commons Attribution 4.0 International (CC-BY-4.0) (URI: https://creativecommons.org/licenses/by/4.0/)
Status:	Curation Level: Enhanced curation (URI: https://wiki.pangaea.de/wiki/Curation_levels)
Size:	249 data points
*/
Date/Time	Latitude	Longitude	Whale	Certainty	Ind [#]
2013-06-15T09:46:53	-56.75678	-0.00005	Whale, unidentified	definite	1
2013-06-15T10:00:54	-56.79903	-0.00028	Megaptera novaeangliae	definite	4
2013-06-15T10:16:18	-56.84590	-0.00035	Megaptera novaeangliae	definite	2
2013-06-15T10:21:10	-56.86070	0.00003	Megaptera novaeangliae	definite	2
2013-06-15T10:54:50	-56.96338	0.00012	Megaptera novaeangliae	probable	1
2013-06-15T11:20:58	-57.00107	0.00102	Megaptera novaeangliae	definite	5
2013-06-15T14:02:10	-57.00408	0.00380	Megaptera novaeangliae	definite	2
2013-06-15T14:38:15	-57.00428	0.00587	Megaptera novaeangliae	definite	3
2013-06-19T00:58:57	-63.50430	0.01672	Balaenoptera aff. bonaerensis	definite	1
2013-06-19T11:12:21	-63.91687	-0.02615	Whale, unidentified	definite	1
2013-07-02T11:18:57	-67.95903	-6.89280	Balaenoptera aff. bonaerensis	definite	1
2013-07-02T11:47:07	-67.96808	-6.88380	Balaenoptera aff. bonaerensis	definite	3
2013-07-02T13:21:46	-68.00625	-6.75715	Balaenoptera aff. bonaerensis	definite	2
2013-07-02T13:26:55	-68.01368	-6.73643	Balaenoptera aff. bonaerensis	definite	2
2013-07-02T14:26:45	-68.03025	-6.67617	Balaenoptera aff. bonaerensis	definite	1
2013-07-02T15:50:34	-68.03068	-6.67275	Balaenoptera aff. bonaerensis	definite	1
2013-07-02T20:48:05	-68.01103	-6.67330	Balaenoptera aff. bonaerensis	definite	1
2013-07-02T22:54:56	-68.00065	-6.67148	Balaenoptera aff. bonaerensis	probable	1
2013-07-02T23:06:30	-67.99975	-6.67132	Balaenoptera aff. bonaerensis	definite	2
2013-07-03T01:14:28	-67.99018	-6.66808	Balaenoptera aff. bonaerensis	definite	1
2013-07-03T10:00:36	-67.96202	-6.65465	Balaenoptera aff. bonaerensis	probable	1
2013-07-03T10:39:18	-67.96017	-6.65503	Balaenoptera aff. bonaerensis	definite	1
2013-07-03T14:00:20	-67.95343	-6.66015	Balaenoptera aff. bonaerensis	definite	2
2013-07-03T20:23:20	-67.94408	-6.65342	Balaenoptera aff. bonaerensis	definite	1
2013-07-04T01:00:00	-67.93523	-6.67762	Balaenoptera physalus	definite	1
2013-07-05T02:41:08	-67.89507	-6.78960	Balaenoptera physalus	definite	1
2013-07-05T07:43:41	-67.89507	-6.78960	Balaenoptera aff. bonaerensis	definite	1
2013-07-05T09:22:08	-67.87952	-6.83737	Balaenoptera aff. bonaerensis	definite	1
2013-07-05T13:47:18	-67.86960	-6.84718	Balaenoptera aff. bonaerensis	definite	1
2013-07-05T14:36:55	-67.84185	-6.90172	Balaenoptera aff. bonaerensis	probable	1
2013-07-05T18:29:18	-67.83810	-6.91798	Balaenoptera aff. bonaerensis	definite	2
2013-07-06T11:02:05	-67.82510	-6.98692	Balaenoptera aff. bonaerensis	probable	1
2013-07-07T14:26:03	-67.61943	-8.21888	Whale, unidentified	definite	1
2013-07-07T14:41:37	-67.21288	-9.93152	Whale, unidentified	definite	2
2013-07-07T20:25:20	-67.21312	-9.98180	Balaenoptera aff. bonaerensis	definite	1
2013-07-08T10:37:18	-67.20190	-10.01315	Balaenoptera aff. bonaerensis	definite	1
2013-07-08T10:44:59	-67.16458	-13.17160	Balaenoptera aff. bonaerensis	definite	1
2013-07-09T01:52:02	-67.16022	-13.21277	Balaenoptera aff. bonaerensis	definite	1
2013-07-09T02:09:51	-67.20138	-13.27093	Balaenoptera aff. bonaerensis	definite	1
2013-07-09T12:02:18	-67.20192	-13.27118	Balaenoptera aff. bonaerensis	definite	2
2013-07-09T14:51:42	-67.21328	-14.81395	Balaenoptera aff. bonaerensis	definite	1
2013-07-14T07:45:33	-67.22288	-15.62568	Balaenoptera aff. bonaerensis	definite	2
2013-07-16T11:26:23	-67.17325	-23.20643	Balaenoptera aff. bonaerensis	definite	1
2013-07-16T11:32:54	-66.77902	-26.16040	Balaenoptera aff. bonaerensis	definite	1
2013-07-16T15:19:19	-66.76432	-26.18547	Balaenoptera aff. bonaerensis	definite	3
2013-07-16T16:57:38	-66.64643	-26.43278	Balaenoptera aff. bonaerensis	definite	4
2013-07-16T17:07:23	-66.64052	-26.68970	Balaenoptera aff. bonaerensis	definite	2
2013-07-16T17:18:19	-66.63882	-26.74502	Balaenoptera aff. bonaerensis	definite	2
2013-07-16T17:26:10	-66.63753	-26.81043	Balaenoptera aff. bonaerensis	definite	4
2013-07-16T17:38:13	-66.64533	-26.84905	Balaenoptera aff. bonaerensis	definite	5
2013-07-17T07:33:04	-66.66733	-26.87448	Balaenoptera aff. bonaerensis	definite	1
2013-07-17T10:55:20	-66.45760	-26.77980	Balaenoptera aff. bonaerensis	definite	1
2013-07-17T11:04:58	-66.25972	-26.87263	Balaenoptera aff. bonaerensis	definite	1
2013-07-17T11:40:41	-66.24198	-26.89290	Balaenoptera aff. bonaerensis	definite	1
2013-07-17T11:48:34	-66.24115	-26.94267	Balaenoptera aff. bonaerensis	definite	1
2013-07-17T19:10:54	-66.24008	-26.95800	Balaenoptera aff. bonaerensis	definite	1
2013-07-18T11:22:58	-65.96483	-27.28255	Balaenoptera aff. bonaerensis	definite	1
2013-07-20T12:20:22	-64.51070	-29.64588	Balaenoptera aff. bonaerensis	definite	1
2013-07-20T12:36:11	-61.76030	-34.96883	Balaenoptera aff. bonaerensis	definite	3
2013-07-20T12:38:30	-61.76510	-35.02015	Balaenoptera aff. bonaerensis	definite	1
2013-07-20T12:56:14	-61.76248	-35.03037	Balaenoptera aff. bonaerensis	definite	>10
2013-07-20T13:15:41	-61.74670	-35.12235	Balaenoptera aff. bonaerensis	definite	1
2013-07-20T13:16:51	-61.73383	-35.21000	Balaenoptera physalus	definite	4
2013-07-20T13:26:02	-61.73265	-35.21623	Balaenoptera aff. bonaerensis	definite	2
2013-07-20T13:27:55	-61.73235	-35.26560	Balaenoptera aff. bonaerensis	definite	2
2013-07-20T13:36:00	-61.73197	-35.27510	Balaenoptera aff. bonaerensis	definite	1
2013-07-20T14:30:23	-61.73125	-35.31633	Balaenoptera aff. bonaerensis	definite	1
2013-07-20T14:43:07	-61.69813	-35.60410	Balaenoptera aff. bonaerensis	definite	1
2013-07-20T15:07:42	-61.69710	-35.68292	Balaenoptera aff. bonaerensis	definite	1
2013-07-20T15:18:22	-61.68520	-35.81073	Balaenoptera aff. bonaerensis	definite	1
2013-07-20T15:36:50	-61.67387	-35.87155	Balaenoptera aff. bonaerensis	definite	1
2013-07-20T18:19:56	-61.67275	-35.97062	Balaenoptera aff. bonaerensis	definite	2
2013-07-20T18:38:40	-61.64427	-36.96655	Whale, unidentified	definite	1
2013-07-20T18:40:27	-61.62673	-37.10210	Whale, unidentified	definite	1
2013-07-20T18:45:28	-61.62402	-37.11032	Balaenoptera aff. bonaerensis	definite	3
2013-07-20T18:46:33	-61.61912	-37.14472	Balaenoptera aff. bonaerensis	definite	2
2013-07-20T18:48:05	-61.61710	-37.15293	Balaenoptera aff. bonaerensis	definite	2
2013-07-20T18:49:22	-61.61603	-37.16528	Balaenoptera aff. bonaerensis	definite	1
2013-07-20T19:17:38	-61.61495	-37.17345	Balaenoptera aff. bonaerensis	probable	1
2013-07-21T17:52:27	-61.57713	-37.36807	Balaenoptera aff. bonaerensis	definite	4
2013-07-24T01:15:52	-61.15527	-42.58003	Balaenoptera aff. bonaerensis	definite	1
2013-07-30T08:16:06	-62.28625	-55.69975	Balaenoptera aff. bonaerensis	definite	1
2013-08-11T19:17:48	-63.53023	-51.12368	Cephalorhynchus commersonii	probable	3