The Royal Norwegian Yacht Club I located in Huk Aveny 1, 0287 Oslo.

Transportation: The nearest airport i OSL Gardermoen, but it is also possible to fly to Torp in Sandefjord. Both airports have train and bus options in to Oslo.

At the Gardermoen its two possibilities to get to nearest train station – Skøyen:
Its either vy.no (local train) or Flytoget.no (AirPort express). 
They takes  the same time, but flytoget runs later in the evening and earlier in the day.
Local train (Vy) runs 3 times an hour.
From the train station at Skøyen its 7 min by car, or 35/40 min walk to Huk Aveny 1.

It is also bus options.

Taxi – There are several taxi options in Oslo Uber, Bolt og Oslo Taxi.