Articles | Volume 14, issue 1
© Author(s) 2023. This work is distributed underthe Creative Commons Attribution 4.0 License.
Understanding the drift of Shackleton's Endurance during its last days before it sank in November 1915, using meteorological reanalysis data
- Final revised paper (published on 27 Jan 2023)
- Preprint (discussion started on 09 Sep 2022)
Comment types: AC – author | RC – referee | CC – community | EC – editor | CEC – chief editor |
: Report abuse
CC1: 'Comment on hgss-2022-9', Gwyn Griffiths, 12 Sep 2022
- AC3: 'Reply on CC1', Marc De Vos, 21 Dec 2022
RC1: 'Comment on hgss-2022-9', Anonymous Referee #1, 02 Oct 2022
- AC1: 'Reply on RC1', Marc De Vos, 21 Dec 2022
RC2: 'Comment on hgss-2022-9', Anonymous Referee #2, 31 Oct 2022
- AC2: 'Reply on RC2', Marc De Vos, 21 Dec 2022
- AC4: 'Reply on RC2', Marc De Vos, 22 Dec 2022
Peer review completion
AR: Author's response | RR: Referee report | ED: Editor decision
ED: Publish subject to minor revisions (review by editor) (31 Dec 2022) by Kevin Hamilton
AR by Marc De Vos on behalf of the Authors (10 Jan 2023)  Author's response Author's tracked changes Manuscript
ED: Publish subject to technical corrections (14 Jan 2023) by Kevin Hamilton
AR by Marc De Vos on behalf of the Authors (14 Jan 2023)  Author's response Manuscript
This paper presents an interesting new reanalysis of meteorological data that augments and complements previous studies on the drift of the Endurance prior to the vessel's sinking.
The following are relatively minor comments:
Line 34: "low frequency" - for posterity, as I cannot find the detail elsewhere, please include the type and actual frequencies of the sidescan sonar. While its frequency may be considered "low frequency" on the radio frequency spectrum, for underwater acoustics it is likely to be either medium or high frequency, that is, above 20 kHz.
Line 52: "local time" - it is only near the end of the paper than the reader finds the longitude and so is able to interpret local time. The nuances between Zone Time (integer hour offset from GMT (UTC)) and Ship's Time, and the relationship of Ship's Time to Local Apparent Noon on the Endurance are discussed in Bergman and Stuart (2019). This paper also gives insights into the accuracy of navigational sights during earlier parts of the voyage.
Line 53: There is no attempt to quantify what is meant by accurate. Perhaps a reading of, and reference to, Bergman and Stuart may help. Also affecting accuracy may be the reanalysis using modern lunar ephemerides and catalogues of star positions in the unpublished paper by Bergman et al. available at http://fer3.com/arc/imgx/OccultationCEPreprint.pdf
Line 136: Multiplying the 24-hour error range of 4 km to 10 km by four for the 4 day period is too simplistic. It would be a fair approximation if and only if there was no change in direction for the drift over the 4 days. The error per day should be treated as a vector and not a scalar and the 4-dat vector error estimated.
Bergman, L. and Stuart, R.G., 2019. Navigation on Shackleton’s voyage to Antarctica’. Records of the Canterbury Museum, 33, pp.5-22