Aquanaut 5167a Water Resistance?

[ts3]

Originally Posted by l_chissle

We definitely need more info on this!

No matter how you look at it this will remain a massive downgrade in the advertised capabilities of their sports watches. The only info that might be helpful is if the 120m were exaggerated by as much as a factor 4 in the past or if they just refuse to stand behind more than 30m now to be able to have a single number across the catalogue (as they claim in their info), well knowing that the real number remains a lot higher for some of the sports watches.

[l_chissle]

Originally Posted by ts3

No matter how you look at it this will remain a massive downgrade in the advertised capabilities of their sports watches. The only info that might be helpful is if the 120m were exaggerated by as much as a factor 4 in the past or if they just refuse to stand behind more than 30m now to be able to have a single number across the catalogue (as they claim in their info), well knowing that the real number remains a lot higher for some of the sports watches.

Well 30m of true diving I think is > 120m of static pressure.

[ts3]

Originally Posted by l_chissle

Well 30m of true diving I think is > 120m of static pressure.

Your thinking is not correct...

TLDR Static pressure is all that matters when you are diving or swimming. Different story if you fall off a speed boat or jet ski.

Static pressure is rho x g x h, dynamic pressure is rho /2 x v^2 and I didn't get my PhD in physics to remember that... LOL

For dynamic pressure equivalent to the static pressure at h = 30m depth you'd need to move your hands at nearly 25m/s or 90 km/h in the water. Try to do that as a human being in water... Different story if you fall off a speed boat or jet ski but then you'll have other problems. But I'd not use a 30m rated Patek on a jet ski. For dynamic pressure equivalent to the static pressure at h = 120m depth the required speed increases to around 50m/s or 180 km/h. Of course you need to add static and dynamic pressure to arrive at the total pressure you'll need to compare with the rating of your watch.

I have been using my 5711 swimming, free diving (won't get lower than 10m depth), and paddling all the time and I have been doing the same with my 60m rated IWC Mark XV for 20+ years no problem.

[l_chissle]

Originally Posted by ts3

Your thinking is not correct...

TLDR Static pressure is all that matters when you are diving or swimming. Different story if you fall off a speed boat or jet ski.

Static pressure is rho x g x h, dynamic pressure is rho /2 x v^2 and I didn't get my PhD in physics to remember that... LOL

For dynamic pressure equivalent to the static pressure at h = 30m depth you'd need to move your hands at nearly 25m/s or 90 km/h in the water. Try to do that as a human being in water... Different story if you fall off a speed boat or jet ski but then you'll have other problems. But I'd not use a 30m rated Patek on a jet ski. For dynamic pressure equivalent to the static pressure at h = 120m depth the required speed increases to around 50m/s or 180 km/h. Of course you need to add static and dynamic pressure to arrive at the total pressure you'll need to compare with the rating of your watch.

I have been using my 5711 swimming, free diving (won't get lower than 10m depth), and paddling all the time and I have been doing the same with my 60m rated IWC Mark XV for 20+ years no problem.

Interesting, thanks for that additional insight. I wonder how fast the human arm swings when doing front stroke.

I guess this also proves that 20m rated watches have significant buffer to "splash proof"?

[ts3]

Originally Posted by l_chissle

Interesting, thanks for that additional insight. I wonder how fast the human arm swings when doing front stroke.

I guess this also proves that 20m rated watches have significant buffer to "splash proof"?

You can swim at 1-2m/s in water. Your hands should move faster when they hit the water. Not quite sure how fast exactly but I guess sth close to 5m/s max and certainly a lot slower than 25m/s.

Just to add, jumping into the water / cliff diving is a problem just like falling off a jet ski. If you jump from 5m you'll enter the water at 10m/s. In theory this leaves quite some safety margin to the 25m/s equivalent of a 30m depth rating but I'd avoid any jumping unless a watch is rated at 100+m.

[Partekular]

Originally Posted by ts3

You can swim at 1-2m/s in water. Your hands should move faster when they hit the water. Not quite sure how fast exactly but I guess sth close to 5m/s max and certainly a lot slower than 25m/s.

Just to add, jumping into the water / cliff diving is a problem just like falling off a jet ski. If you jump from 5m you'll enter the water at 10m/s. In theory this leaves quite some safety margin to the 25m/s equivalent of a 30m depth rating but I'd avoid any jumping unless a watch is rated at 100+m.

So is it your conclusion that all Patek watches claiming 30m water resistance can be sadly used while casual swimming?

I do wonder if Patek would cover repairs in all cases where water ingress had occurred in a swimming pool or a swim in the sea. I am also slightly suspicious that depths over 30m claims for their watches have been reduced to 30m.

[ts3]

Originally Posted by Partekular

So is it your conclusion that all Patek watches claiming 30m water resistance can be sadly used while casual swimming?

I do wonder if Patek would cover repairs in all cases where water ingress had occurred in a swimming pool or a swim in the sea. I am also slightly suspicious that depths over 30m claims for their watches have been reduced to 30m.

According to the laws of physics it should be safe to use a 30m water rated watch for casual swimming. That said, I will not use my 30m rated 3998 in the water. Who knows what its actual rating is 8 years after the last service. I am not getting my watches pressure tested every year and then there is the strap. But I am swimming, snorkeling, and paddling with a 60m rated IWC and a 5711. IWC say a 60m rated IWC is good for water sports and snorkeling.

https://www.iwc.com/de/en/specials/water-resistant.html

No idea how easy it would be to have Patek (or any watch maker) cover the repairs in case of actual water damage and hopefully I will never find out.

[l_chissle]

Originally Posted by ts3

You can swim at 1-2m/s in water. Your hands should move faster when they hit the water. Not quite sure how fast exactly but I guess sth close to 5m/s max and certainly a lot slower than 25m/s.

Just to add, jumping into the water / cliff diving is a problem just like falling off a jet ski. If you jump from 5m you'll enter the water at 10m/s. In theory this leaves quite some safety margin to the 25m/s equivalent of a 30m depth rating but I'd avoid any jumping unless a watch is rated at 100+m.

Time to scuba with my skeleton. 30m depth, slow-ish arm movements, should be fine right? ;)

[Andad]

Originally Posted by ts3

You can swim at 1-2m/s in water. Your hands should move faster when they hit the water. Not quite sure how fast exactly but I guess sth close to 5m/s max and certainly a lot slower than 25m/s.

Just to add, jumping into the water / cliff diving is a problem just like falling off a jet ski. If you jump from 5m you'll enter the water at 10m/s. In theory this leaves quite some safety margin to the 25m/s equivalent of a 30m depth rating but I'd avoid any jumping unless a watch is rated at 100+m.

There are some fairy stories on TRF but this one should win a prize.

[ts3]

Originally Posted by Andad

There are some fairy stories on TRF but this one should win a prize.

So you are suggesting to happily jump with less than 100+m rated watches?

[Crown & Shield]

Originally Posted by Andad

There are some fairy stories on TRF but this one should win a prize.

Man, I cannot believe people actually believe those myths