An algorithm that estimates fishing exploitation at 0.5 degrees resolution from activity-classified vessels trajectories. Produces a table with csquare codes, latitudes, longitudes and resolution and associated overall fishing hours in the time frame of the vessels activity. Requires each activity point to be classified as Fishing or other. This algorithm is based on the paper 'Deriving Fishing Monthly Effort and Caught Species' (Coro et al. 2013, in proc. of OCEANS - Bergen, 2013 MTS/IEEE). Example of input table (NAFO anonymised data): http://goo.gl/3auJkM - Process category: Vessels