Alternatives to Marathon Navigator
Discussion
What options are there for a tool watch that’s similar to the Marathon Navigator?
Something with at least 100m water resistance would be good, as the Navigator’s only let down by its 30m rating.
Something with at least 100m water resistance would be good, as the Navigator’s only let down by its 30m rating.
Boldr venture. Titanium case, cheap, 100m water resistance, looks good
https://www.boldrsupply.co/collections/boldr-ventu...
https://www.boldrsupply.co/collections/boldr-ventu...
SVS said:
So a watch rated to 100m isn't good enough for snorkelling?Don't wear a watch in a hot bath - no matter what its depth rating is!!
Sudden hot water immersion = crown expands quicker than case due to its smaller mass per unit of surface area
Soapy bath water = low surface tension so can penetrate even the smallest of gaps (it's why hydraulic fracking uses detergents and acids to make 'slick water')
The rest of the depth rating can really be a case of marketing and pub blagging rights rather than engineering.
Sudden hot water immersion = crown expands quicker than case due to its smaller mass per unit of surface area
Soapy bath water = low surface tension so can penetrate even the smallest of gaps (it's why hydraulic fracking uses detergents and acids to make 'slick water')
The rest of the depth rating can really be a case of marketing and pub blagging rights rather than engineering.
I guess that’s the end of hot baths for me.SVS said:
I'd ignore this chart. Why would the pressure rating not be accurate? richthebike said:
SVS said:
I'd ignore this chart. Why would the pressure rating not be accurate? lostkiwi said:
Pressure rating is static pressure. As soon as the watch moves there is dynamic pressure caused by movement plus the static pressure.
This. As it was explained to me, think of a swimmer doing front crawl and slamming their hand into the water, the watch is experiencing a far greater pressure, relative to the depth it is at. https://www.hodinkee.com/articles/what-dive-watch-...
Here you go.
I stumbled on this when I got my Darth Tuna. Rated at 1000m. Check out the video at over 4000m below.
Final paragraph dispels the static / dynamic argument nonsense too.
Here you go.
I stumbled on this when I got my Darth Tuna. Rated at 1000m. Check out the video at over 4000m below.
Final paragraph dispels the static / dynamic argument nonsense too.
Dive watches are different to normal watches in that they are measured against ISO 6425 which defines a different set of criteria to a basic static test.
Normal ISO 2281 testing allow random batch testing whereas 6425 demands each watch is tested for compliance. ISO 2281 also allows a much shorter duration of a 10 minutes at the rated depth whereas 6245 is 2 hours at 125% of rated pressure.
There is also a 10cm test over an hour for ISO 2281 compared to 50 hours at 30cm for ISO 6245. There are many other differences too.
Hodinkees calculated pressures are also incorrect. Swimming can generate an increase of 5m of pressure. Not too much of an issue at 100m but for a 30m rated watch....
If you factor activities like splashing, diving or jet skis then 30m just won't cut it and 100m would be questionable, even though the watch goes nowhere near its rated depth.
Normal ISO 2281 testing allow random batch testing whereas 6425 demands each watch is tested for compliance. ISO 2281 also allows a much shorter duration of a 10 minutes at the rated depth whereas 6245 is 2 hours at 125% of rated pressure.
There is also a 10cm test over an hour for ISO 2281 compared to 50 hours at 30cm for ISO 6245. There are many other differences too.
Hodinkees calculated pressures are also incorrect. Swimming can generate an increase of 5m of pressure. Not too much of an issue at 100m but for a 30m rated watch....
If you factor activities like splashing, diving or jet skis then 30m just won't cut it and 100m would be questionable, even though the watch goes nowhere near its rated depth.
Gassing Station | Watches | Top of Page | What's New | My Stuff