A version of rowing Venetian way, where the oarer pushes from stern handling two oars one with each hand. The oars cross so that the left arm manoeuvres the right oar and viceversa.
Unlike in normal Venetian way, the oarer keeps the right foot forward, instead of the left.
The left oar is forward the right one cause of the slightly staggered location of the two ṇgari (the seats of the crutches): This is because, meeting oncoming boats in narrow canals, the rower has to promptly draw in and lay down the left oar, pushing it forward inside the boat; here too the use was stated by the war reasons exposed in the Rowing Venetian Way page.
The Vaesana is quite a difficult rowing technique, overall because of the peculiarity of Venetian crutches (forcole), shaped as a mirror "C", that do not catch the oars, which must be kept in position by the perfect balancing of the rower with the angle of coming out of the blades from the water.
In popular language, to tell somebody, out of context: "You rowed Vaesana way" is like to impute him a past experience of gaol.