Errata

Note - These errata apply to the first edition only. The errors have been corrected in the 2nd Edition of The Radar Book.

Page 3

The MV Stockholm was a Swedish ship, not Norwegian.

Pages 11 to 15

In the process of enhancing the radar display images for the book, errors have been introduced into the images as indicated below:

Figure 1-7 In the screencapture, numeric values of 90.0^oR and 0.169 NM are given for the position of the cursor, but the cursor is not visible in the image.

Figure 1-9 In the screencapture, numeric values of 62.5^oR and 1.119 NM are given for the position of the cursor, but the cursor is not visible in the image. Also the EBL has been rotated to a position that is not consistent with the numerical read-out.

Figure 1-11 The cursor and the VRM circles were removed in order to simplify the image but the numerical VRM indication remains. In Figure 1-13, the VRM indication shows that the VRM is outside the display.

Page 81, Middle Text Box

The text in the text box has been cut short. It should read as follows " ‘Radial thickness’ means the thickness of a ‘pip’ or other image on the display measured from the center of the display to the edge."

Page 164, Figure 9-6

The caption to the right has been cut off short. The last sentence should read, "The land echo does not rotate, but with the change in course, it now follows a different RM line as well."

Pages 211 and 221

According to the American Practical Navigator, "aspect" means the relative bearing of own ship from target ship, measured 0^o to180^o port (red) or starboard (green). This means that when the aspect is 76^o red, you are viewing the target ship from 76^o on its port side. Therefore, in a practical sense, the definition of "aspect" at the bottom of page 211 and on page 221 is also correct.

Page 212, Fig A-9

The aspect is actually 73^o.

Page 213, Figure A-10

The aspect is actually 114^o.

Page 213, Figure A-11

The arc of the aspect has been incorrectly drawn. It should lie between the TM of the target A’ and the bearing line from the A’ to the center of the maneuvering board.

Page 215, Caption for Figure A-13

"Course at 12:39" should read "Speed at 12:39".

Pages 218, 219, Minimum Range and Minimum Range Resolution

The theoretical limits for minimum range and range resolution are a result of the characteristics of the pulse length, but the practical limits also are related to the resolution of the display, and the degree of anti-Rain Clutter applied. Consequently the actual specified values differ from the theoretical values given in the table on page 217.

Click here to view the Errata Sheet for the first edition of The Radar Book in PDF format.

GPS--Instant Navigation--2nd Edition

(Note on GPS Accuracy Standards:
In spite of the formal specifications for GPS Accuracy, our research shows that in many cases, consumer GPS receivers may be capable of resolving positions to 10 meters (33 feet) or less. Also, we have observed less short term fluctuations in positioning than expected. Previous to May 1, 2000, Selective Availability was the primary source of GPS error. The amount of Selective Availability [SA] applied to the satellite signals varied rapidly, and consequently produced rapidly shifting apparent positions. However, now the primary source of GPS error is ionospheric and atmospheric interference. Since the ionospheric influences change in value much more slowly than SA, the result is that GPS positioning fluctuations will vary over longer periods--hours instead of minutes or seconds.
November 25, 2000)

Proven Cruising Routes, Volume One -- Seattle to Ketchikan
Updated May 12, 2003

Note: With the exception of the error on page 75 (waypoint BC175), the errors noted below are typographical errors and do not affect the waypoints in "Proven Cruising Routes on Disk".

Click here to view the Errata Sheet for Proven Cruising Routes in PDF format.

Pages 14 and 210

Note: Certain cautions pertaining to GPS accuracy and Selective Availablity on page 14 and page 210 (Appendix A), no longer apply. (On May 1, 2000 on executive order of President Clinton, Selective Availability was removed forever. Official government sources now estimate unassisted GPS accuracy at 20 meters or less instead of 100 meters.

Page 23

Waypoint WA109 (Southbound route)

The latitude and longitude of this waypoint are incorrect.
Reads          48^o16.19' N, 122^o 50.10' W
Change to    48^o 13.91' N, 122^o 50.80' W

Page 24

In the detail map in the center right of the page, waypoints WA111 and WA112 are not shown. Replace with amended detail map. Click on the link to the right to view or print the amended detail map.

Page 27

Waypoint BC017 (Northbound route)

The entry in the column "Magnetic Course to Next Waypoint" is incorrect
Reads           353^o M
Change to     332^o M

Page 29

The longitudes of all the waypoints on these three pages are numbered incorrectly
Reads           122^oChange to     123^o

Waypoint BC114—(Southbound route) The entry in the column "Magnetic Course to Next Waypoint" is incorrect
Reads           109^o M
Change to     089^o M

Pages 31 and 61

On May 19, 2000 the Victoria Harbourmaster published a traffic scheme to be followed by all vessels and seaplanes operating in Victoria Harbour. Consequently waypoint BC101 may not be in precisely the appropriate position depending on the length of your boat.
To read about the Victoria Harbour Traffic Scheme, click here.

Page 40

The detail map for waypoint WA202 is missing. Refer to page 32, lower right detail.

Pages 43, 45 and 47

The longitudes of all the waypoints on these three pages are numbered incorrectly
Reads          123^oChange to    122^o

Page 49

Waypoint WA301 (Southbound route)

In the column "True Course to Next Waypoint")
Delete          180^o T

Page 53

Waypoint WA309 (Westbound route)
The entry in the column "Magnetic Course to Next Waypoint" is incorrect
Reads          347^o M
Change to    326^o M

Page 54

The waypoint at the entrance to Port Sidney in the map page is numbered incorrectly.
Reads         BC116
Change to   BC016

Page 75

Waypoint BC175--This waypoint should be moved to the south approximately 0.05 Nm.
Co-ordinates for this waypoint read 49^o 16.97' N, 124^o 05.93' W
Change to                                       49^o 16.93' N, 124^o 05.92' W

Page 87

Waypoints BC151 to BC160 ( Northbound route)--The bearings in the columns "Magnetic Course to Next Waypoint" and True Course to Next Waypoint" are in error by exactly 180^o. Magnetic Courses should read (downward) as follows—240^oM, 278^oM, 269^oM, 258^oM, 234^oM, 217^oM, 285^oM, 292^oM, 280^oM, 282^oM. True Courses should read (downward) as follows—260^oT, 298^oT, 289^oT, 278^oT, 254^oT, 237^oT, 305^oT,

311^oT, 300^oT, 302^oT.

Page 89

Waypoints BC161 to BC167 ( Northbound route)--The bearings in the columns "Magnetic Course to Next Waypoint" and True Course to Next Waypoint" are in error by exactly 180^o. Magnetic courses should read (downward) as follows— 292^oM, 320^oM, 244^oM, 302^oM, 284^oM, 306^oM, 330^oM. True Courses should read (downward) as follows— 312^oT, 340^oT, 004^oT, 322^oT, 304^oT, 326^oT, 350^oT.

Page 109

Waypoints BC437 & BC438 (Northbound route)

The longitude for these waypoints, in both columns for NAD83 and NAD27 is incorrect.
Reads          126^o.
Change to    127^o.

Page 125

Waypoints BC534, BC535 and BC536 (Northbound and Southbound routes)

The longitude for these waypoints, in both columns for NAD83 and NAD27 is incorrect.
Reads          126^o.
Change to    127^o.

Page 127

Waypoint BC441 (Northbound route) is named in error.
Reads          BC441.
Change to    BC440

Page 146

Waypoint BC560 in the top left detail map is named in error.
Reads          BC560
Change to    BC590

Page 147

Waypoint BC560 (Northbound route and Southbound route) is named in error.
Reads          BC560
Change to    BC590

Page 161

Waypoints BC703, BC705, and BC707 (Southbound route)

The entries in the column "Magnetic Course to Next Waypoint" are incorrect

BC703 Reads 530^o M    Change to 170^o M

BC705 Reads 533^o M    Change to 173^o M

BC707 Reads 531^o M    Change to 171^o M

Page 163

Waypoint BC714 (Southbound route)
The entry in the column "Magnetic Course to Next Waypoint" is incorrect
Reads         518^o M

Change to   158^o M

Page 166

Route 32 ( upper left corner of map page) should read Route 31

Page 177

Waypoints BC660 and BC661 -- The distance between these two waypoints is incorrect.
Reads          3.06 Nm.
Change to    5.06 Nm.

Page 207

Waypoint AK132 (Southbound route)
The entries in the columns "Magnetic Course to Next Waypoint" and "True Course to next Waypoint" are incorrect
Reads          021^o M and   356^o T

Change to    159^o M and   184^o T

To submit errors you have found, please click here

Last updated February 7, 2009