Final answer:
The two dark blocks signify an MEA gap on V465 between MALAD CITY (MLD) VOR and JACKSON (JAC) VOR, indicating a gap in obstruction clearance at the MEA along this airway segment.
Step-by-step explanation:
The two dark blocks along V465 between MALAD CITY (MLD) VOR and JACKSON (JAC) VOR, located just southwest of the VOR changeover point, are indicating a MEA GAP.
This means there is a gap in the Minimum Enroute Altitude (MEA) that ensures both obstruction clearance and reliable navigation signal coverage along that segment of the airway. In this context, the correct interpretation of the notation is that there is a gap in obstruction clearance at the MEA along this route, which is significant for flight safety.
Pilots flying along V465 need to be aware of this gap to maintain the required altitude that ensures both navigation signal coverage and obstruction clearance.
The two dark blocks along V465 between MALAD CITY (MLD) VOR and JACKSON (JAC) VOR indicate a gap in navigation signal coverage in that area. This means that there may not be a reliable signal for navigation equipment during this part of the route. However, this gap will not affect the flight as there is no impact on the Minimum En Route Altitude (MEA) or obstruction clearance along this route.