Conundrum

[Steve Clayton]

I am on my boat floating around in a small and contained lake.

I decide to anchor and the anchor (plus chain) goes over the side with the anchor resting fully on the bottom of the lake.

What, if anything, happens to the depth of water in the lake?

 

[Boomshanka]

At a guess, the level will change in response to the difference between weight (displacement) and volume of the ground tackle?

 

[martyn78]

The water level will drop as the volume of chain etc. is smaller than the volume of displaced water (already in the boat).
I'm sure there is someone who will/can use the correct terminology.

 

[geoid96]

The level will go down (not a lot!). The boat displacement will decrease by the weight of anchor and chain. This will only be partially offset by the volume of the anchor & chain which will be less.

 

[martyn78]

'We' are obviously bored.
But not enough to actually try it ...... yet.

 

[BobnLesley]

The level will go down (not a lot!). The boat displacement will decrease by the weight of anchor and chain. This will only be partially offset by the volume of the anchor & chain which will be less.


+1

 

[Evadne]

When afloat the boat displaces the weight in air of the boat + anchor.
When anchored, the anchor and grounded chain no longer affects the boat's displacement, so the mass of water displaced is reduced by the mass of the chain in air, less its weight in water...and the dangling chain will not make a difference to the displaced water, so I agree with geoid96, the water will go down.

 

[Boomshanka]

When afloat the boat displaces the weight in air of the boat + anchor.
When anchored, the anchor and grounded chain no longer affects the boat's displacement, so the mass of water displaced is reduced by the mass of the chain in air, less its weight in water...and the dangling chain will not make a difference to the displaced water, so I agree with geoid96, the water will go down.

At what point do I claim a 'Lakesailor' (re: post #2)

 

[geoid96]

At what point do I claim a 'Lakesailor' (re: post #2)

But in post 2 you didn't say whether the level went up or down. As you only partially answered the connundrum, I respectfully suggest that your claim for a "Lakesailor" is rejected.

 

[Boomshanka]

But in post 2 you didn't say whether the level went up or down. As you only partially answered the connundrum, I respectfully suggest that your claim for a "Lakesailor" is rejected.

I'd like to think there is a claim under Clause 4b and c of the LakeRegs along the lines of 'similarity'

 

[geoid96]

I'd like to think there is a claim under Clause 4b and c of the LakeRegs along the lines of 'similarity'

The question is whether my answer is”essentially the same” as yours. I would argue that it is not. I am not disputing the points you make, however:
• You do not completely answer the OPs question as what happens to the depth of water in the lake.
• You do not explain the two different and opposing effects on water level caused by the reduction in vessel displacement and the water displaced by the anchor & chain.
My answer merely supplements and clarifies your own and therefore, in my opinion, no Lakesailoring exists.

 

[jimi]

depends which country it is in. If its scotland the level will increase cos of the rain, if its in the middle of the Sahara it'd be a mirage!

 

[Sandyman]

Anchoring in Birdham Pool, Steve ? Is that allowed

 

[macd]

The water level will go down and it's not been a conundrum since Archimedes was a lad.

 

[Boomshanka]

The question is whether my answer is”essentially the same” as yours. I would argue that it is not. I am not disputing the points you make, however:
• You do not completely answer the OPs question as what happens to the depth of water in the lake.
• You do not explain the two different and opposing effects on water level caused by the reduction in vessel displacement and the water displaced by the anchor & chain.
My answer merely supplements and clarifies your own and therefore, in my opinion, no Lakesailoring exists.

I graciously take your point, but I feel bad...

Edit: Bloomin' eck... just noticed post #3... there's a 'lakesailoring' conspiracy going on in this thread

 

[Clyde_Wanderer]

I am on my boat floating around in a small and contained lake.

I decide to anchor and the anchor (plus chain) goes over the side with the anchor resting fully on the bottom of the lake.

What, if anything, happens to the depth of water in the lake?

Anchor punches a hole in the lake bed, all the water drains out and you walk ashore and realise, What the hell am I doing posting **** like this.
C_W

 

[geoid96]

Edit: Bloomin' eck... just noticed post #3... there's a 'lakesailoring' conspiracy going on in this thread

I'm certain that post wasn't there earlier when I made my first reply and when we were discussing the alleged Lakesailoring.

 

[Steve Clayton]

Anchoring in Birdham Pool, Steve ? Is that allowed

If/when we go out they have to raise the level in the pool!

 

[Twister_Ken]

Takes no account of evaporation or precipitation. We need to know ambient atmospheric conditions.

 

[LittleSister]

I am on my boat floating around in a small and contained lake.

I decide to anchor and the anchor (plus chain) goes over the side with the anchor resting fully on the bottom of the lake.

What, if anything, happens to the depth of water in the lake?

Which brand of anchor?