Thanks to the following site visitors for their contributions to the Timeline:
10 August 2003: Jonathan Greifenberger, former AT&T Submarine Systems transmission engineer, for additional information on some of the 1990s cables.
3 December 2003: João Mota Vieira of the Azores Submarine Cable Station for additional information on recent cables in the region.
2 January 2004: José Herdade of Portugal Telecom for updated information on cables landing in Portugal.
30 March 2004: Per Ljung, Survey Manager, Swedia Networks AB, for information on Scandinavian cables, 1988-2000.
3 October 2005: Derek Bullock, Director of Operations at Hibernia Atlantic for updated information on the Hibernia cable, 2001.
4 October 2005: Gustavo Coll, former telegraph technician in Uruguay, for updated information on cables in that region (1866, 1892, 1910, 1920).
8 October 2005. Dave Shirt, former cable engineer, for updated information on the 1977 OLUHO cables.
2 January 2006. David Watson, formerly of STC, for much detailed information on STC cable laying in the 1970s and 80s.
25 March 2006. Garrett Austin of International Telecom for information on the company's cables and cableship.
7 July 2006. Per H. Lehne, Editor, Telektronikk,
Telenor R&D, for information on Telenor's 2004 cable.
24 January 2013. Graeme Marett for information on Channel Islands cables.
27 October 2014. Jon Clark for information on All America and Commercial Cable Company cables, from the papers of his grandfather, Nelson J. Perryman.