QUICK TIP: Have a single-masted sailboat? Consider a splitter (especially if you're a racer). At less than 3dB, splitter signal loss is typically not enough to cause a noticeable reduction in VHF radio range while the AIS range gained from the masthead position can be appreciable. Cost will be about equal to a second antenna mounted on a rail – plus there will be savings in weight (and no cable-running headaches!) QUICK TIP: Have a power boat without space for an additional VHF antenna on cabin top or arch? A splitter will help reduce antenna clutter. Placing your AIS antenna too close to another antenna (even if the other antenna is not active) can greatly reduce AIS reception. This makes a splitter a good choice when space is at a premium.