Lee,
Only if it was a fairly thick curry
The problem with very accurate digital devices is how to set them.
It is possible a bench mark for Ordinance Survey is accurate to a foot above sea level.
We have old ones round here, maybe 100 years old or more?
But sea levels have changed and different locations have different sea levels.
Mascons also influence sea levels.
New surveys often differ by a foot or two in standard heights.
Then land heights vary with tectonic plate action and earth tremors.
GPS accuracy is variable in commercial units, maybe 5ft or 10ft height accuracy. but professional units may be accurate to cms.
A recent cheap purchase is much more sensitive than the old one I gave to a friend who crossed the Sahara alone on an off road motorbike using it. Both simple yellow Garmins.
The friend flies Boeing 727s as a sideline.
The local airfield is now quoted as one foot higher than before. Perhaps they put in new tarmac or recalibrated.
Some runways that were 27 or 270 degrees are now 28 or 280 degrees because of magnetic pole drift.
The Earth Moon distance is measured regularly to cm. accuracy using the laser reflectors left on the moon. I wonder whether they will degrade over time.
The Minox small binoculars are not that great, but they were really low price and worth it just for the accurate altimeter.