Mobile Crossing WayPoint Map Loader Instrukcja Operatora Pobierz pdf (Strona 73)

SeaMarks manual VI. Menu Reference •

••

• 73

Restore Settings

If your User Preferences data gets corrupted, you can restore the original copy that came with the program from the CD.

Push this button and navigate to the appropriate drive where this information is held.

This routine is also useful if a form disappears or cannot be accessed due to being moved off screen too far to grab. This

happens sometimes if dual monitors are used and then one monitor is removed. In this case, the form locations can be on

the missing monitor. This routine removes all saved form information in the Windows "Registry" and starts with all

forms centered on the main screen. If this was the case, you do not need to reload the original settings, just select

RESTORE SETTINGS and then cancel out, exit the program, and start over.

Select Loran Chains

The Loran chain pairs are used by the program to perform all calculations involving Loran. If you reside in SE USA, an

example of custom Loran chain numbers for central West Coast Florida is initially installed when you get the program.

Similar example setups are used for the North Atlantic coast, the Central Atlantic coast, The West Gulf coast, the West

US coast, Hawaii, the Mediterranean, and Scandinavia. If you are not using obsolete Loran chains or you have no

intention of ever using Loran, you should be able to leave this selection as is. If the default selection is not what you

need, select the chain pairs you need by pushing the Select Chains Button. This brings up the Chain Selection dialog

box shown later.

There were 23 Loran C systems active or discontinued, and there were 64 Loran A systems. These are available in the

chain file. In addition, the Department of Homeland Security, in its' infinite wisdom, made changes to the timing of the

9960 and 8970 chains such that it is important to know if your data was taken before 1/17/2007 or after. Two sets of

station information are available for these two chains and the user has to keep in mind which one he needs for what

numbers. If you are faced with this situation, and the default chain choices are not right, do a custom chain selection and

make the first instance of 9960bXY be the before 1/17/07 and the second one be 9960aXY for after. The program shows

which is which but you need to keep track.

For the USA, the Loran system covers most of North America as shown below. Loran chains are represented by the

Group Repetition Interval (GRI). This represents the period between radio pulse groups sent by the master and slave

stations in the chain. For example, the 7980 chain covers the Southeast. This chain radiates pulses every 0.07980

seconds.

1 2 ... 68 69 70 71 72 73 74 75 76 77 78 ... 129 130

Brak uwag

Mobile Crossing WayPoint Map Loader Instrukcja Operatora Strona 73