All the Sail-World websites and displaying advertising banners utilise similar geolocation technology as used on Google search.
This means that whenever a person visits Sail-World the site recognises the location of the device being used from its IP address, ISP and other analytical tools. This can be a visit from a search link click or entering Sail-World.com in the address bar. The Sail-World site content for the visitors regional location is then displayed on the device including the ad banners for that region. It is also possible for visitors to view the content and ad banners on overseas Sail-World sites from within their own region by selecting regions from the 'Edition' drop down menu on top of site.
Here's how a geolocation provider, describes its product:
IP Location is a non-intrusive geo IP solution to help you to identify [a] visitor's geographical location, i.e. country, region, city, latitude, longitude, ZIP code, time zone, connection speed, ISP, domain name, IDD country code, area code, weather station code and name, mobile carrier, elevation and usage type information using a proprietary IP address lookup database and technology without invading the Internet user's privacy. The solution is available as [a] database, programming API and hosted solution.