This Dear Colleague Letter (DCL) invites proposals in FY 2018 that will advance Navigating the New Arctic (NNA) research through convergent approaches to emerging scientific, engineering, societal, and education challenges, and builds upon the NNA awards resulting from the FY 2017 DCL on Growing Convergence Research at NSF. A systems-based approach is strongly encouraged, including research that both contributes to, and leverages, large data sets from enhanced observational technology and networks. Knowledge co-production with local and indigenous communities, advancing public participation in research, and international partnerships are also strongly encouraged as possible means to achieve NNA objectives. This is not a special competition or a new program; proposals in response to this DCL must meet the requirements and deadlines of the program to which they are submitted. Organizations submitting proposals to programs and funding vehicles without deadlines are encouraged to submit proposals by May 1, 2018, to be considered for FY 2018 funding.