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Change |
27 |
In Figure 2.4-1 caption, the valid latitude range of the formula is the same as the table, namely 15º. Indeed at latitudes below 20º the formula might over estimate the wind speeds.
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Chapter 8 |
Near live observations from FTPmail have been discontinued. There are options using saildocs, see https://davidburchnavigation.blogspot.com/2019/07/ftpmail-buoy-and-station-observations.html
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47 |
Figure 3.2-7 Caption, next to last sentence: (driving SE monsoon) should be (driving SW monsoon).
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64 |
Table 3.5-2 notes reference to "Figure 3.5-3" should be Table 3.5-3.
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77 |
Table 4.1-1, Table Note 3. (Chapter 5) should read "(Table 5.4-3)".
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85-87 |
(1) Metop-A is discontinued. We now use B and C. Table 4.2-2 values for C are
43689, 2018-087A, 2018-11-7
(2) In the download links page 84, change META to METB or METC
(3) Only ASCAT in grib format is now from LuckGrib and Expedition. No direct gov. source nor other commercial source.
(4) In Fig 4.2-11 the wissc.edu link is no longr valid. The lizard-tail link continues to be useful.
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100 |
Reference to Section 7.8 should be to 7.6 (there is no 7.8!)
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117 |
Figure 4.7-3. In the Southern latitudes, should read "Right side, wind veering" and "Left side, wind backing" in both SH examples. |
133 |
#27 should read:To estimate duration required for fully developed seas, it takes a duration in hours equal to about one-half the wind speed in knots to develop seas to most of their potential for winds less than 20 kts, but a duration in hours equal to the wind speed for winds about 30 kts and higher—thus 18 kts would take about 9 hr to develop; 35 kts would take about 35 hr to develop. For 20 to 30 kts, it is somewhere roughly 3/4 the wind speed. |
152 |
There are now 72h forecasts that should be incorporated into the sequencing.
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158 |
https://ocean.weather.gov/shtml/briefing.shtml from page 158 no longer available online. It is now https://ocean.weather.gov/shtml/briefing.php |
176 |
Second column, second paragraph from bottom. PDTY should read "PTDY" for Pressure Tendency.
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182-183 |
Remove reference to Appendix B in the Coast Pilot. In June, 2020 they changed a decades-long tradition, and now have this weather data scattered though across the various sections of the Coast Pilot. There are still the two main types of data tables shown in Figure 8.2-2 and 8.2-4.
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188 |
Table 8.3-1 Notes. Change FTPmail command from Send to to Get. Saildocs uses "send"; FTPmail uses "Get."
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195 |
Table 8.5-1 We left out an important source UUplus.com, which is a popular, fast service for satellite communications, with high compression. |
197 |
top left link has been changed to https://www.weather.gov/marine/usamz
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202 |
Table 8.6-5, Chesapeake, VA should be Portsmouth, VA.
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Sec 8.2 & Sec 8.3 |
Saildocs now archives GFS and WW3 files for 14 days, not the 30 days listed. Other models are saved for shorter periods of time, maybe just a few days. Access by adding |file=2019120518 (18z, Dec 5, 2019) |
Throughout |
As of march 2021, OPC has not supported grib format for ASCAT data.
Also, the links to the graphic data have changed. See updates in ASCAT NEWS: the good and the bad
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page 28,29 |
When done digitally we can get more accurate isobar radaii, and from that we see improved notes on these corrections.
Report of 15 kts at 54N, 154W R is about 5º yielding correction of about 5%, not the 20% cited.
Report of 10 kts at 31N, 158W R is more like 2.8 than 3.5, but conclusion of no correction is still right
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ebooks (pg 79 equivalent) |
Figure 4.1-2 is missing and a duplicate of Table 4.1-3 is in its place. Correct figure is here. |
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