8. At the 50 minutes, signals will be received from the ship. The ordinary signal will be 5 reversals, each 2 minutes’ duration.
9. Then a repetition of the same series to be made and continued.
10. Should ship desire to open communication by special speaking instruments, notice will be received by a signal of 8 reversals (giving a deflection the opposite to the ordinary signals) of ¼ minute’s duration.
11. After returning the same signal to the ship as an acknowledgment, the speaking instruments to be put in circuit, and the message from the ship received, and when acknowledgment of message, or reply, is given, the regular system of signals to be resumed as if no interruption had occurred.
12. Every 50 nauts. of the Cable payed-out will be signalled to the shore by signal (instead of the ordinary signals). This signal will be 10 reversals of 1 minute each—the first current giving a deflection the opposite side to the first current of the ordinary signals.
13. Every 50 nauts. distance run will be signalled to the shore: the signal will be 2 reversals of 2 minutes’ duration, 2 reversals of 1 minute’s duration, and 2 reversals of 2 minutes’ duration—the first current giving a deflection opposite to the first deflection of the first current of the ordinary signal.
14. Should ship receive weak or defective signals, or bad time kept, notice will be given by sending 2 reversals of 5 minutes each, commencing the opposite side to the ordinary signals.
15. When the ship gets into soundings, notice will be given by sending one current of 10 minutes’ duration, the opposite side to the first current of the ordinary signals.
16. When land is in sight, notice will be given by the same signal.
17. Greenwich time to be kept, but a column to be devoted to local time in the journals and sheets.