Investigating the AOTTP tagging that took place over the Sierra Leone Seamounts in late 2016 and early 2017

The aim of this code is to demonstrate one way of creating the shortest paths between the release and recovery locations of a tagged tuna while avoiding land. It is adapted from a shipping application after the blog by Thiemo Fetzer [found here](https://www.r-bloggers.com/computing-maritime-routes-in-r/).

Update on AOTTP progress for Steering Committee. January 2017.

The International Commission for the Conservation of Atlantic Tunas (ICCAT) (www.iccat.int), an intergovernmental organization whose Secretariat headquarters is based in Madrid, Spain, contracted Globefish Consultancy Services (GCS) to develop a statistical modeling approach to estimate overall Atlantic long-line (LL), bait-boat (BB) and purse seine (PS) effort by time-area strata (EFFDIS) that will meet the stated needs of the ICCAT Standing Committee on Research and Statistics (SCRS). This update of the EFFDIS dataset is critical, especially with regard to by-catch evaluations. Tangible deliverables are scheduled to take the form of the outputs summarized below.

Interim progress report for EFFDIS contract