Davis Artificial Horizon

Really very handy to practice with.

good

Summing up - this clever bit of kit lets you take sights from your backyard or building rooftop day or night using a tiny pool of water protected from the elements. This makes celnav practice much easier to achieve!The Davis comes with two clear glass panes, two colored ones for taking sun sights, and two triangular supports. All pieces fit neatly inside a 4x6x1” water reservoir which doubles as storage box. It is a breeze to set up. The panes shield the water against wind, creating a still ima…ge. It is this artificial horizon's central advantage over using a bucket or deep dish.Altitudes below 10 degrees get challenging on account of the reservoir's rim, and high altitudes are limited to half your sextant’s arc, 65 degrees for most but 50 for the Davis Mark 3. And do not expect to take sights other than the Sun, its planets or the brightest stars. Otherwise the reflection off the water will be too weak.Remember to adjust your sight for index error and then divide by two because the reflection doubles the altitude. No dip correction needed because there is no dip.A winning idea that empowers taking sights from anywhere.

The product is delivered in a box without any instructions on use or even assembly, not even an website to refer. Another disappointment about Davis products.

Oggetto perfetto spedizione veloce

Great for practice, fog or obscured horizon...has lots of filters for every condition...will not work with your celestial overhead or at a high angle.

Artificial Horizon is a top product, already own sextant Davis Mark 25. Had a scratch on blue filter glass, notified Davis and got a replacement sent to Europe. Am very satisfied with 2 Boater and Davis!

Ideal para practicar con el sextante y poder calcular la altura de los astros en casa o con condiciones meteorológicas adversas.

The AH works exactly as expected. It nicely collapses into its 'water tank' and fits conveniently into my sextant case. Comes with a helpful instruction pamphlet.

Great tool to practice sextant use in land

Really very handy to practice with.

good

Summing up - this clever bit of kit lets you take sights from your backyard or building rooftop day or night using a tiny pool of water protected from the elements. This makes celnav practice much easier to achieve!The Davis comes with two clear glass panes, two colored ones for taking sun sights, and two triangular supports. All pieces fit neatly inside a 4x6x1” water reservoir which doubles as storage box. It is a breeze to set up. The panes shield the water against wind, creating a still ima…ge. It is this artificial horizon's central advantage over using a bucket or deep dish.Altitudes below 10 degrees get challenging on account of the reservoir's rim, and high altitudes are limited to half your sextant’s arc, 65 degrees for most but 50 for the Davis Mark 3. And do not expect to take sights other than the Sun, its planets or the brightest stars. Otherwise the reflection off the water will be too weak.Remember to adjust your sight for index error and then divide by two because the reflection doubles the altitude. No dip correction needed because there is no dip.A winning idea that empowers taking sights from anywhere.

The product is delivered in a box without any instructions on use or even assembly, not even an website to refer. Another disappointment about Davis products.

Oggetto perfetto spedizione veloce

Great for practice, fog or obscured horizon...has lots of filters for every condition...will not work with your celestial overhead or at a high angle.

Artificial Horizon is a top product, already own sextant Davis Mark 25. Had a scratch on blue filter glass, notified Davis and got a replacement sent to Europe. Am very satisfied with 2 Boater and Davis!

Ideal para practicar con el sextante y poder calcular la altura de los astros en casa o con condiciones meteorológicas adversas.

The AH works exactly as expected. It nicely collapses into its 'water tank' and fits conveniently into my sextant case. Comes with a helpful instruction pamphlet.

Great tool to practice sextant use in land