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spherical trigonometry using a chronograph (timing device)

GPS has largely replaced traditional celestial navigation Consider a navigator using a chronograph to measure the time it takes for a celestial body to transit the observer’s meridian. By applying spherical trigonometry, the navigator can calculate the di
1Y
By: hmmmcamu
7
hmmmcamu
1278

Thanks so much for the kind words 🙏🏻

School holidays for the kids and they wanted to see something new, so… OK, Dubai itself wasn’t new for them, so we built in some day trips to expand the horizon. By the time this one came along the family decided that they were tired already and needed a
1Y
By: KMII
34
KMII
7790

The great masquerader: Rolex Milgauss trying to pass as a Rolex Explorer

Take off: crisp clean air. Snow-capped mountains. Green valleys Landing: Desert. Desert. Air pollution visible as a layer below the skies. “Surely, of all the wonders of the world, the horizon is the greatest.” – Freya Stark
1Y
By: Lankysudanese
16
gary_g
2686

Incoming: Lange 1 Moon Phase

Thrilled to add this captivating piece to my collection! In past posts, I speculated that a Lange 1 would possibly be next on my horizon. I was fortunate to own the regular Lange 1 in pink gold a few years ago, however I came to find it kind of a challeng
1Y
By: aviya
26
aviya
6317

Has to be the Horizon Blue...

This colour scheme is just so nice. I don't like that strap so I'd go for something different but this kind of blue is just remarkably pretty.
1Y
By: ripper444
25
roundel
5478

Yes! Both IWC Boutique had the Portugieser 40mm in Horizon Blue in their display cases.

But, like I mentioned to Jon, I was laser-focused on seeing the new Portugieser Automatics. I absolutely love the 1815 Up/Down. That one has been tugging at my heart for years now. This may be the year to make it a reality . . . Thanks, my friend!🥂
1Y
By: Mach
38
Mach
11512

Best look on your wrist here was ALS 1815 up/down

What a fun quest! Question - did you see the portugieser 40 auto in horizon blue? That has been on my mind a lot. I like the 40mm and big sub seconds. I wish a little thinner (11.8 IIRC)- but I guess same as a gmt🤷‍♂️ the 1921 always looks good too.
1Y
By: Mach
38
Mach
11512

Sunset on the horizon

After a drenching rain for over 24 hours, it’s starting to clear up here in New England. The late afternoon palette of colors is quite special this time of day. And yes, the SM300 Heritage has been glued to my wrist for one week straight ! 😉 Have a great
2Y
By: Aquaracer1
6
Chronometer (aka yacomino)
1393

Dear Art, I don't know Bahrain.

But I imagine that it is very horizon-broadening to live or work in such a country for a while. When were you there? Here are a few photos, at least from Oman. Can you spot any similarities? Entrance to Mutrah Souq: Grand Sultan Qaboos Mosque: Fish market
1Y
By: MTR
31
Abu Alex
5982

Happy Birthday Nicolas´ 5110P !! I can well understand your love dear friend. Almost two decades with you and the love is strong. This is a marvelous watch. A magical watch. A romantic timepiece.

A beautiful timepiece which makes us day dream with exotic far places, places we know and love, places we would love to discover some day. An old Patek advertising for the ref 1415 read: "This wrist watch is for the man whose interests go beyond the horiz
2Y
By: amanico
68
amanico
17202