Which types of separation methods can be applied between SVFR fixed-wing aircraft?

The correct choice involves understanding the separation methods applicable between Special Visual Flight Rules (SVFR) fixed-wing aircraft. Among the methods listed, non-radar and visual separation are appropriate. Non-radar separation relies on pilots and air traffic controllers maintaining situational awareness without the use of radar systems, using position reports and estimated times to coordinate safe distances. Visual separation, on the other hand, allows pilots to maintain separation from other aircraft visually, which is particularly relevant in SVFR conditions where pilots are allowed to maneuver under visual flight rules.

Choosing non-radar with visual makes sense as both methods require the pilot's ability to see and identify other aircraft in close proximity, leveraging their judgement to avoid collisions. This is essential in SVFR operations, as these flights are typically conducted in weather conditions that may limit visibility but still allow for visual navigation.

Other methods listed do not exclusively pertain to SVFR fixed-wing operations. For instance, while radar separation can be effective, it may not always be available or required for SVFR operations. Altitude separation alone would not sufficiently encompass the operational environment for SVFR fixed-wing aircraft, where horizontal separation through visual or non-radar means is crucial.