Uploaded November 2023 | Updated September 2026, 2 weeks ago
Play World of Warships here: wo.ws/3SGK3R9
Thank you World of Warships for sponsoring this video.
During registration use the code HSF2023 to get for free: 200 doubloons, 1 million credits, 7 Days of Premium Account time, HSF commander Misaki Akeno, and HSF commander Irizaki Mei.
Applicable to new users only.
Developed in the 1870s, heliographs used reflected sunlight to send coded messages over long distances. Surprisingly useful despite their simplicity, heliographs were used by military and civilian organizations (e.g. forestry services) for over 100 years.
0:00 Introduction
0:47 World of Warships Promo
2:21 Development of the Heliograph
6:31 Heliograph Users
9:15 Setup, Controls, and Accessories
12:14 Alternative Heliograph Designs
14:04 Survival Heliographs
15:00 Outro
SOURCES:
rcsigs.ca/index.php/Lamp_Signalling_B
historynet.com/light-conversation-heliograph
smecc.org/heliograph_-_signaling_by_the_sun.htm
royal-signals.org.uk/Datasheets/THE_HELIOGRAPH.php
books.google.ca/books?id=pzkZPIXm89UC&printsec=frontcover&source=gbs_ge_summary_r&cad=0#v=onepage&q=canadian%20army&f=false
books.google.ca/books?id=sA5KDfwzI3MC&pg=PA533&redir_esc=y#v=onepage&q&f=false
nps.gov/fobo/learn/historyculture/the-heliograph.htm
nzhistory.govt.nz/media/photo/ottoman-heliograph
gvrhc.org/Library/Heliograph.pdf
modulatedlight.org/Modulated_Light_DX/Heliograph.html
phillosoph.blogspot.com/2016/08/survival-heliographs-when-sun-is-behind.html
patents.google.com/patent/US2557108A/en
Play World of Warships here: wo.ws/3SGK3R9
Thank you World of Warships for sponsoring this video.
During registration use the code HSF2023 to get for free: 200 doubloons, 1 million credits, 7 Days of Premium Account time, HSF commander Misaki Akeno, and HSF commander Irizaki Mei.
Applicable to new users only.
Developed in the 1870s, heliographs used reflected sunlight to send coded messages over long distances. Surprisingly useful despite their simplicity, heliographs were used by military and civilian organizations (e.g. forestry services) for over 100 years.
0:00 Introduction
0:47 World of Warships Promo
2:21 Development of the Heliograph
6:31 Heliograph Users
9:15 Setup, Controls, and Accessories
12:14 Alternative Heliograph Designs
14:04 Survival Heliographs
15:00 Outro
SOURCES:
rcsigs.ca/index.php/Lamp_Signalling_B
historynet.com/light-conversation-heliograph
smecc.org/heliograph_-_signaling_by_the_sun.htm
royal-signals.org.uk/Datasheets/THE_HELIOGRAPH.php
books.google.ca/books?id=pzkZPIXm89UC&printsec=frontcover&source=gbs_ge_summary_r&cad=0#v=onepage&q=canadian%20army&f=false
books.google.ca/books?id=sA5KDfwzI3MC&pg=PA533&redir_esc=y#v=onepage&q&f=false
nps.gov/fobo/learn/historyculture/the-heliograph.htm
nzhistory.govt.nz/media/photo/ottoman-heliograph
gvrhc.org/Library/Heliograph.pdf
modulatedlight.org/Modulated_Light_DX/Heliograph.html
phillosoph.blogspot.com/2016/08/survival-heliographs-when-sun-is-behind.html
patents.google.com/patent/US2557108A/en
