 Portland Harbour and Weymouth Bay are the main areas used for sailing . The harbour covers an area of 8 @.@ 6 square kilometres ( 2 @,@ 125 acres ) , and is ideal for sailing as it is exposed to reliable winds from most directions , but is sheltered from large waves and currents by Chesil Beach and the breakwaters . The clubhouse houses facilities on two floors , including a gymnasium , seven lecture and meeting rooms for 260 people , an event hall with kitchens and a bar , VIP meeting rooms and offices , a lounge bar and cafeteria seating 350 people , and two balconies . The outside of the academy complex has a 40 @-@ metre ( 131 ft ) slipway and two deep water slipways , 30 pontoons with disabled access , <unk> and boat hoists , boat storage and parking areas . WPNSA also operates Boscawen House , formerly an admiral 's residence , which offers accommodation for a maximum of 47 people . The clubhouse generates 15 – 20 % of its electricity from solar cells , and rainwater is collected from the roof to wash boats . 
