(2)
A pilot sees the other aircraft involved and upon instructions from the controller provides his own separation by maneuvering his aircraft as necessary to avoid it. This may involve following another aircraft or keeping it in sight until it is no longer a factor. (See See and Avoid) (Refer to Federal Air Regulations Part 91)

VORTAC/VHF OMNIDIRECTIONAL RANGE/TACTICAL AIR NAVIGATION - A navigation aid providing VOR azimuth, TACAN azimuth, and TACAN distance measuring equipment (DME) at one site. (See VOR, Distance Measuring Equipment, TACAN, Navigational Aids)
VORTICES/WING TIP VORTICES - Circular patterns of air created by the movement of an airfoil through the air when generating lift. As an airfoil moves through the atmosphere in sustained flight, an area of high pressure is created beneath it and an area of low pressure is created above it. The air flowing from the high pressure area to the low pressure area around and about the tips of the airfoil tends to roll up into two rapidly rotating vortices, cylindrical in shape. These vortices are the most predominant parts of aircraft wake turbulence and their rotational force is dependent upon the wing loading, gross weight, and speed of the generating aircraft. The vortices from medium to heavy aircraft can be of extremely high velocity and hazardous to smaller aircraft. (See Wake Turbulence, Aircraft Classes)
VOR/VHF omnidirectional range station - A ground-based electronic navigation aid transmitting Very High Frequency navigation signals, 360 degrees in azimuth, oriented from magnetic North. Used as the basis for navigation in the national airspace system. The VOR periodically identifies itself by Morse Code and may have an additional voice identification feature. Voice features may be used by Air Traffic Control or Flight Service Stations for transmitting instructions/information to pilots. (See Navigational Aids)
VOT/VOR TEST SIGNAL - A ground facility which emits a test signal to check VOR receiver accuracy. Some VOT's are available to the user while airborne, and others are limited to ground use only. (Refer to Federal Air Regulations Part 91)
WAKE TURBULENCE - Phenomena resulting from the passage of an aircraft through the atmosphere. The term includes vortices, thrust stream turbulence, jet blast, jet wash, propeller wash and rotor wash, both on the ground and in the air. (See Jet Blast, Aircraft Classes)
WARNING AREA - (See Special Use Airspace).

WAYPOINT - A predetermined geographical position used for route/instrument approach definition, or progress reporting purposes, that is defined relative to a VORTAC station or in terms of latitude/longitude coordinates. (NGA assigned Waypoint names are strictly for electronic identification in the Digital Aeronautical Flight Information File (DAFIF). Neither FAA nor ATC use these Waypoints for flight planning or clearance requests.)
WEATHER ADVISORY/INFLIGHT WEATHER ADVISORY - (See SIGMET, AIRMET)
WEATHER ADVISORY/WS/WST/WA/CWA - In aviation weather forecast practice, an expression of hazardous weather conditions not predicted in the area forecast, as they affect the operation of air traffic and as prepared by the National Weather Service.