SI
SI
discoversearch

We've detected that you're using an ad content blocking browser plug-in or feature. Ads provide a critical source of revenue to the continued operation of Silicon Investor.  We ask that you disable ad blocking while on Silicon Investor in the best interests of our community.  If you are not using an ad blocker but are still receiving this message, make sure your browser's tracking protection is set to the 'standard' level.
Politics : Politics of Energy -- Ignore unavailable to you. Want to Upgrade?


To: Logain Ablar who wrote (51774)5/16/2014 6:48:19 PM
From: Eric  Read Replies (1) | Respond to of 86355
 
NOAA has been using "physical references" way, way before GPS showed up in the late 1980's.

There is a NOAA tidal gauge very close to my waterfront home here on Puget Sound.

Been there for over 80 years...