To design such a map, one needs to use these 2 Android components:

• LocationManager - provides a GPS location (lat,long) every second
• TelephonyManager - provides a cellID=(mmc,mcc,lac,cid) the radio is currently camping on

and cellID database to know the (lat,long) of each cell ID.

Susan Cole-Haley on Twitter. (n.d.). Twitter. Retrieved 17 February 2021, from https://twitter.com/susancolehaley/status/1340231804431773699

‘Why wouldn’t I get it?’: The experts leading the battle against COVID anti-vaxxers. (2021, February 7). https://www.abc.net.au/news/science/2021-02-08/covid-19-coronavirus-vaccine-misinformation-inoculation-theory/13125164

ReconfigBehSci. (2021, February 8). UK faith leaders join to counter fears over vaccine in BAME communities https://t.co/OMVcWvIVhQ [Tweet]. @SciBeh. https://twitter.com/SciBeh/status/1358753137918623747

UK faith leaders join to counter fears over vaccine in BAME communities. (2021, February 7). The Guardian. http://www.theguardian.com/society/2021/feb/07/faith-leaders-join-to-counter-fears-over-vaccine-among-bame-communities

This could easily be used to spoof tanker vessels and hijack them electronically.

Gleam Project | COVID-19 Mobility USA

Bourassa, K. J. (2020, June 10). State-level Stay-at-home Orders and Objectively Measured Movement in the United States During the COVID-19 Pandemic. https://doi.org/10.31234/osf.io/hyd57

Brzezinski, A., Kecht, V., Van Dijcke, D., Wright, A. (2020) Belief in Science Influences Physical Distancing in Response to COVID-19 Lockdown Policies. BFI. https://bfi.uchicago.edu/working-paper/belief-in-science-influences-physical-distancing-in-response-to-covid-19-lockdown-policies/

David Garcia on Twitter

Gollwitzer, A., Martel, C., Marshall, J., Höhs, J. M., & Bargh, J. A. (2020, May 5). Connecting Self-Reported Social Distancing to Real-World Behavior at the Individual and U.S. State Level. https://doi.org/10.31234/osf.io/kvnwp

El Shoghri, A., et al. (2020 April 03). How mobility patterns drive disease spread: A case study using public transit passenger card travel data. 2019 IEEE 20th International Symposium on "A World of Wireless, Mobile and Multimedia Networks". DOI:10.1109/WoWMoM.2019.8793018

Best site to learn about fuel monitoring system and its uses

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If all of the space boats travel at the same velocity and the same distance from the Earth's surface, the time shift of the on-board clock due to relativity would be the same. The difference between the clocks would be almost the same. How would the trouble appear?