NOTES 1 Navigators must observe the current regulations, issued by the National Maritime Authority, for navigation in the aquatic spaces covered in this letter. 2 The navigator in this area must take into account at all times the Regulations to Prevent Collisions and Collisions. WARNING The navigator should not rely entirely on floating navigation aids, because they could be out of position due to external factors. CAUTION The depths in this chart vary constantly due to the sediments provided by the Estero Salado. MARINE PROTECTED AREA The coverage area of this nautical chart is located within the El Morro wildlife refuge, The activities within it will be subject to the provisions of the National Environmental Authority.