Faulty Scanned and Missing Pages
If there is a problem reading a log page because of the quality of the scan, please post a description of the problem and a link to the page in this topic.
If a page is missing*
, please post a description of the problem and a link to the page before the missing page in this topic.
You may see two (or more) pages from a ship's log with the same date. There are two main causes: duplicate scans and duplicate copies. Duplicated dates may also occur when ships cross the International Date Line*
of log pages appear when the same day has been scanned
This can happen because the page was accidentally scanned twice (e.g., http://oldweather.s3.amazonaws.com/ow3/final/USCS%20Patterson/Book%201/IMG_4775_0.jpg
) or because the page was rescanned due to the poor quality of the first scan but the first scan was not removed. If you transcribed the first scan, there is no need to transcribe the second scan. Just click on "I've finished with this page". If the first scan is unreadable, please transcribe the second scan. Occasionally you will have to transcribe some data from the first scan and some from the second. If you are not sure how to transcribe the data, don't hesitate to post a question in this topic or the ship's Discussion topic. You can also do a search to find out what other transcribers have done.
Duplicates can also be caused by inserts. See Inserts in bound logbooks below. Duplicate copies
of log pages appear when the same day has been logged
This could have happened if the log keeper accidentally recorded, for example, March 1 in the February log book and then correctly recorded it in the March log book. It could also have occurred if someone copied the log book and accidentally copied a page twice. Even if the data on the two pages are exactly the same, you will be able to see differences between the pages. On some duplicated pages the data are NOT the same (see 7am weather codes in http://s3.amazonaws.com/oldweather/ADM53-40562/ADM%2053-40562-187_0.jpg
). In such cases, the scientists would very much like to have both pages transcribed, in order to see how accurate the original log keepers/copiers were.NOTE: We have both the original logbook and the copy of some US logs, so there are occasionally several months of duplicates. The scanners/programmers tried to remove the duplicates earlier, but some were missed. Please post in this topic when you find such duplicates. They are not worth transcribing, so just keep clicking "I've finished with this page" without entering any data until you've worked through them.
Inserts in bound logbooks
In most cases the left- and right-hand pages of the log book are included in a single image which is then split into two. If an insert covers the left-hand page, two scans will be required: one with the insert visible and one with the log page visible. This will generate two copies of the right-hand page.
Whenever you find a log page covered by another sheet, check its JPEG link
and the next couple of JPEG links for a view of what's happening.
There are variations, depending on the size and placement of the insert, but here is an example:
It's often necessary to look at the JPEG link for the other half of the image to read the beginnings or ends of lines, because the insert's placement may cause it to cross the point where the image is split into two pages. It is acceptable to put any transcribing you want to do entirely on one of the two pages. Page joining tool - for when the text you are trying to read is split over two pages
Note: You do not need to report duplicate scans when they are the result of inserts
Ships sometimes cross the International Date Line. If the ship is going west to east, this may lead to two weather and events pages having the same date. Please transcribe these pages as written, since these are technically for two different days and they will have different values.
If the ship is going east to west, this may lead to a date being skipped; for example, going from May 10 to May 12 with no May 11. Please transcribe these pages as written. In both cases, we (and the scientists) would appreciate it if you could post a note here, or in the ship's Discussion topic, stating which pages have been affected.