Standard Engineering Area SEA

EPR - Engineering Possession Reminder (A control applied to facilitate an unconditional reset of axle counters without the application of Aspect Restriction at the end of engineering work (T3, T1A, GSI13, etc))
STR - Special Train Reminder (As for EPR but with slightly different locking, used for the trains that can't be guaranteed to operate axle counters properly)
EPO - Engineering Possession Overlay (A blue shading on the screen used to indicated the extent of engineering work (only applicable when EPR is not used))
SEAs - Standard Engineering Areas (used to apply large sections of EPR and/or EPO and/or Reminders and/or SILs in standard blocks for regular engineering work)
SILs - SPAD Inhibit Longs, used to inhibit the integrated SPAD alarm on signals within engineering work where vehicles legitimately passing signals at danger, or occupation of track sections in the order required to make the alarm believe a vehicle has passed the signal at danger, might cause frequent false alarms and, as well as annoyance, may anaesthetise the signaller to the alarm.