2011 Question 11. Aspect Sequence

[PJW]

If I don't miss anything, everything at my attempt is fine.

Except:
1. Provide the signals off the layout to give the clear view for aspect sequence.
2. MAR needs only berth TC and other TCs with the length of PLJI 800m without delay time. Warning requires Berth TC with delay time.
3. Avoid the non-standard pattern G-YY-Y-Y-R. G-YY-YY-Y-R is ok to use in this case.

Am I right?

thanks again for massive help.

1. Certainly for a layout like this where signals are spaced unevenly it is important to state your assumptions for outside the area depicted.

2. MAR requires the PJJI to be readable no later than the main aspect. The absolute maximum sighting is 800m, but depending on geography may be less than that. A sensible assumption for exam purposes is 400m.
Warning typically to release at 100m from signal. Hence unless there is some obvious hint that the berth track section is very short then it should have a time value- it depends on length but 20 sec would be reasonably typical.
3. G-YY-YY-Y-R is permissible, but is rare but in this case looks to be the best solution.