Sailing - 470 (Pair)
From the Super Mario Wiki
Sailing - 470 (Pair) is a Boat Games Event that appears exclusively in the Nintendo 3DS version of Mario & Sonic at the London 2012 Olympic Games. The objective of the event is to reach the finish line in the fastest time, before the opponents. The starting record for this event is 0:28:33.
In the game's story mode, Sailing - 470 (Pair) appears as the challenge of Mario Episode 2, Foggy Foes, in which Mario and Luigi must beat Dry Bowser and Dry Bones. It also appears as the second part of the fifth challenge of Heroes Episode 5, The Promise to Toad, in which Mario and Sonic must beat Fog Imposters of Luigi and Tails in the event alongside Table Tennis (Doubles) and Badminton (Doubles).
In this event, the player plays as two characters from the Heroes category, and competes against a team of the other two Heroes, as well as a pair of Koopa Troopas and a pair of Chao who will always take the bottom two positions. During the event, the player must use to alter the position of the sail, with the angle and direction shown by an arrow on the water, and blow into the microphone to cause the boat to move forward. The harder the player blows, the further the boat will travel. The player is only allowed to blow at certain times, with time in between to be used for adjusting the boat's course, which cannot be done while the player is blowing or immediately afterwards. If the player hits the buoys at the sides of the course, they will be bounced back onto it and continue in the opposite direction. The course is also filled with whirlpools, which will slow the player down if they come into contact with one, and orange panels that function similarly to Dash Panels and give the player a sort speed boost if sailed over, although they will disappear briefly afterwards and will reappear after a short wile. The whirlpools may either come singularly or in pairs, while the panels either come singularly or in groups of three.
Blow into the mic to reach the goal.
1) Stoke wind: Blow into the microphone (lower screen).