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Errata

Modern Marine Weather 

The primary background reader for the Barometer Handbook.  It is listed at USCG for exam prep, as well as NWS/OPC for background. Used in many schools and merchant marine academies around the country.

Mariner's Pressure Atlas

Monthly values of the mean sea level pressures worldwide along with the monthly values of the standard deviations.
Official Sources in the spirit of a Marine Weather Services Chart. Read the introduction then this webpage is a direct index to the practical resources you might need when underway.
Starpath custom weather map briefings (Read the overview then active links are at the bottom of the article, with links to getting smallest possible file size of maps by email underway.)
   

Figure inland wind speeds from pressure differences. Live Examples from Puget Sound and Strait of Juan de Fuca.

 

Fischer Precision Aneroid Barometer. State-of-the-art, used by navies and national weather services worldwide.
Barometer calibration service online: starpath.com/barometers.  This is the most accurate way to set a barometer short of having a NIST traceable instrument next to your own, because it gives you a time-space average of the nearest official reports, any one of which could be off by a mb or so.
Get ship reports of pressure and pressure tendency, as well as wind and sea state underway by email: shipreports@starpath.com
UW Atmospheric Sciences Forecasts and Observations. There 4/3 km WRF numeric forecasts for Northern Waters and for Puget Sound are the best forecasts available for our local waters.
The Inverse Barometer Effect In Puget Sound by David Burch
This document is referenced in the text but not published elsewhere.
Free cellphone barometer app designed for mariners. Chances are the barometer in your pocket could be, out of the box, the best barometer you have on the boat! 
Cell phones that have barometers  (Not a complete list.)
National pressure tendency forecasts. Excellent (NAM data) for planning barometer checks. Scroll to bottom dataset on the left. This shows expected pressure change in the next 3h; with it you can anticipate hot times for calibration. First red means dropping 4 to 5 mb in next 3h; dark blue meaning rising 4 to 5 mb. Click Loop option, then mouse over the forecast list at the top changes the displays.
  Articles on barometer related topics
  Modern Barometry and its Important Role in Marine Navigation
  Barometer for Wind Warning
  Mean Sea Level, Tides, and Barometers
  "Point Four Four per Floor" — QFE to QNH to QFF
  Air Temperature Dependence of Sea Level Pressure Conversions
  Pressure with Squall Passage
  Mother of all books on barometers
  Tropical Storm Side Determination, Part 1
  Sides of a Tropical Cyclone, Part 2 Meteograms
  First pass at cell phone barometer calibrations
  How to Check the Accuracy of an Airport Pressure Report
  Analog Weather  A unique webpage devoted to barometers
  NOAA Misspeaks on Sandy Storm Surge
  Sample Aneroid Calibration. Just the data and a note on the instrument.