Sorry, A Dis.A book is the Continuous Certificate of Discharge or more commonly known as his discharge book. The book that records all of a seaman's ships including sign on and sign off as well as the ports of engagement and discharge. The book also records character and ability and the type of voyage i.e. Home Trade [HT] or Foreign Going [FG].
What was a CR10 ?
If a CR1 was created each time a Seaman was issued a new Dis.A book, would all of his voyages for that period be recorded on the CR1 ?
No. Foreign only on CR2 and Home Trade would be recorded with a paper discharge.
A CR10 card was introduced in 1918 and stopped in 1921 was designed to allow the Government to
check that the merchant seaman’s exemption from conscription is not abused by men taking an unduly long period ashore between voyages.
The CR10 cards were introduced in August 1918 together, with a new identity and
service certificate (RS2 book) to be carried by the seaman. By far the best site for explaining your requirements is David Snook's site:
http://irishmariners.ie/Would a separate CR2 be issued for each foreign voyage ?
Or would each CR2 cover all voyages in a given ship ?
CR2 cards were continually updated with the foreign voyages but usually only one card was updated and kept and the rest destroyed. However, not all CR1, 2 and 10 cards now survive so you may have to use Crew Agreements of known ships to do your research in the cases were records no longer survive.
've been looking at a couple of Seamen. They each have a CR1 and a CR2. And one also has a CR10. All these cards name a particular ship (or at least its Registration Number), but nothing else.
This is despite these Seamen each being at sea for many years.
Is that usual ?
And in these cases would it be necessary to track their careers through Ship's Crewlists ?
Crew Agreement will certainly be the way forward if no other records available. If you need help with the seamen and you wish to share the name and date of birth I can check where you should be looking. Feel free to send a private message if you dont want to go public.
Regards
Hugh