Scientific research on and projections of the changes taking place in the Arctic vary, but there is a general consensus that the Arctic is warming and that its sea ice is diminishing. For example, scientists at the National Snow and Ice Data Center reported that for 2018 the minimum amount of sea ice coverage in the Arctic—typically occurring in September each year—was the sixth lowest in the satellite record and 656,000 square miles fewer than the mean for the 1981 through 2010 time frame. Further, the scientists found that the 12 lowest recordings of September ice coverage on satellite record have all occurred in the past 12 years. Figure 1 shows the sea ice coverage (i.e., extent) in the Arctic for September 2018 compared with the median ice edge for 1981 through 2010. While much of the Arctic Ocean remains ice-covered for the majority of the year, most scientific estimates predict there will be a continued decrease in sea ice coverage in the Arctic Ocean in the summer sometime in the next 20 to 40 years. According to the Navy’s Arctic Roadmap for 2014 to 2030, while there may be less sea ice there in the future, the ice that remains will continue to be a challenge to those operating in the area. Most commercial ship activity in the Arctic is regional—shipping into or out of the Arctic, mainly in support of commercial activity—not trans- Arctic. However, according to the official Navy estimate from 2013, the decreasing coverage of sea ice will result in more open water allowing increased maritime activity along three trans-Arctic routes from 2012 through 2030: the Northern Sea Route, the Northwest Passage, and the Trans-Polar Route (see fig. 2). This development could, for example, reduce by thousands of miles and by several days of travel the shipping of goods between countries in Asia and North America. Increased economic activity in the Arctic could potentially increase the need for military capabilities there to safeguard U.S. interests. For example, estimates of significant oil, gas, and mineral deposits in the Arctic have increased the interest in exploration opportunities in the region. These resources include an estimated 13 percent of the world’s undiscovered oil; 30 percent of the world’s undiscovered gas; and approximately $1 trillion of minerals including gold, zinc, nickel, and platinum. According to information provided by the Department of State, the vast majority of these resources are within the undisputed continental shelf of the respective coastal states. Officials from the Department of State stated that disputed claims related to the small remaining portions of the Arctic seabed may be addressed within the international framework established by the United Nations Convention on the Law of the Sea. However, as we reported in 2015, even with the changing climate and growing interest in the region, several enduring characteristics will continue to provide challenges to surface navigation in the Arctic for the foreseeable future. These include large amounts of winter ice and increased movement of ice from spring to fall. Increased movement of sea ice makes its location less predictable, a situation that increases the risk that ships can become trapped or damaged by ice impacts. In addition, the lack of infrastructure in the Arctic region affects the reliability of shipping through the area. Economic factors such as risk costs, as well as changes in the shipping market resulting from the Panama Canal expansion may also affect the amount of shipping along these routes. As figure 3 shows, even as the seasonal ice decreases over time, the Navy has projected that the Arctic will remain impassable for most commercial ships for most of the year from 2012 through 2030. These factors combined are likely to affect the pace at which commercial activity will increase. We have previously examined emerging issues and challenges for the United States in the Arctic. See figure 4 for a timeline of our prior reports related to Arctic issues. We also include a list of our prior work related to the Arctic at the end of this report. The Navy’s June 2018 report aligns with DOD’s assessments that the Arctic threat level remains low and that DOD has the capabilities required to execute its 2016 DOD Arctic Strategy. Specifically, the June 2018 report and the information it provides for each of the reporting elements discusses how the department can execute the 2016 DOD Arctic Strategy. The strategy contains two overarching objectives: to (1) ensure security, support safety, and promote defense cooperation and (2) prepare to respond to a wide range of challenges and contingencies to maintain stability in the region. These objectives reflect DOD’s assessment that there is a low level of military threat in the Arctic, as well as the stated commitment of the Arctic nations to work within a common framework of diplomatic engagement. In the strategy, DOD identifies the types of investments that will need to be made over time as activity in the region increases; however, DOD also discusses the importance of assessing the needs in the Arctic and of balancing potential Arctic-specific capabilities investments against other national security priorities and fiscal realities. The Arctic threat assessment briefings we received from officials at the U.S. Northern Command and the Office of Naval Intelligence also reflected the low risk for conflict in the Arctic referenced in the Navy’s June 2018 report. Below, we summarize the Navy’s response to each reporting element, and our evaluation of whether the response aligns with current assessments of Arctic threat levels and capabilities required to execute DOD’s 2016 Arctic Strategy. Reporting Element One: The Navy was required to report on the current naval capabilities of the Department of Defense in the Arctic region, with a particular emphasis on surface capabilities. The June 2018 report provides information on this required element, with the Navy stating that it relies on the submarine force as well as on aviation assets and surface operations when necessary to operate in the Arctic. These capabilities in the Arctic region are consistent with those identified in The United States Navy Arctic Roadmap for 2014 to 2030 to execute the 2016 DOD Arctic Strategy, and as corroborated in our discussions with U.S. Northern Command and Navy officials. In addition, the Navy discusses the significant limitations of its surface ships for Arctic operations in the June 2018 report. The limitations identified are consistent with information contained in the U.S. Navy Cold Weather Handbook for Surface Ships and with information we discussed with Naval Sea Systems Command officials who oversee modifications to the fleet and the acquisition of new ships. For example, Navy officials told us that top-side icing has detrimental effects on ships. As sea spray accumulates on a ship deck and freezes, a ship can lose some of the capabilities of its external sensors and radars and a ship’s stability in the water decreases as the ship’s center of gravity becomes top heavy. Navy and Coast Guard officials told us that while the Coast Guard regularly operates in the Arctic given its ice-breaking and maritime safety missions, among others, Navy surface ships have not been designed to maneuver and operate in icy waters. Although some of the Navy’s T-class ships have some capability to operate in light or broken first-year ice due to the inherent strength of their hulls, traditional surface combatant ships (e.g., Cruisers, Destroyers, or Frigates) are not designed to operate in icy waters. Reporting Element Two: The Navy was required to report on any gaps that exist between the current naval capabilities and the ability of the department to fully execute its updated strategy for the Arctic region. The June 2018 report provides information on this required element, with the Navy stating that the department can execute the 2016 DOD Arctic Strategy with current naval capabilities. The June 2018 report is similarly aligned with Navy assessments of Arctic capabilities and gaps contained in its plan, The United States Navy Arctic Roadmap for 2014 to 2030 that the Office of the Chief of Naval Operations issued in February 2014. This plan provides guidance to prepare the Navy to respond effectively to future Arctic Region contingencies, delineates the Navy’s leadership role, and articulates the Navy’s support to achieve national priorities in the region. At the time of our review, DOD was in the process of drafting another report—on DOD arctic capability and resource gaps—as required by section 1054 of the National Defense Authorization Act for Fiscal Year 2018. In addition, according to Navy officials, the Navy was also drafting its Arctic Strategic Outlook, which is a follow-up to The United States Navy Arctic Roadmap for 2014 to 2030. According to DOD and Navy officials, both forthcoming reports will focus on contextualizing Arctic needs within the framework of the 2018 National Defense Strategy. Because these efforts were not complete at the time of our review, we were unable to determine whether the Navy’s June 2018 report aligns with these assessments. Reporting Element Three: The Navy was required to report on any gaps in the current naval capabilities that require ice-hardening of existing vessels or the construction of new vessels to preserve freedom of navigation in the Arctic region whenever and wherever necessary. The June 2018 report provides information on this required element, with the Navy stating that there are currently no validated capability gaps that require the Navy to ice-harden existing vessels or construct new ice- capable vessels to preserve freedom of navigation in the Arctic. Furthermore, the Navy stated that its current assets are sufficient to execute the 2016 DOD Arctic Strategy. As noted above, freedom of navigation operations are undertaken to, among other things, promote maritime stability and to challenge excessive sovereignty claims. In addition, DOD officials stated that the United States already has options other than Navy surface ships for demonstrating the United States’ freedom to operate in the Arctic, including using Coast Guard vessels, Navy submarines, or military aircraft. Reporting Elements Four and Five: The Navy was required to provide an analysis and recommendation of which Navy vessels could be ice-hardened to effectively preserve freedom of navigation in the Arctic region when and where necessary, in all seasons and weather conditions, and an analysis of any cost increases or schedule adjustments that may result from ice-hardening existing or new Navy vessels. The June 2018 report provides some information on these required elements, with the Navy stating that it is not pursuing ice-hardening or the winterization of surface ships. According to the Navy, because there is no specific capability requirement for the Navy to ice-harden ships, the report does not list or name potential ice-hardening candidates among existing vessels or provide cost or schedule estimates for ice-hardening vessels. Officials with the Naval Sea Systems Command, which develops cost and schedule estimates for ship modifications and new construction, told us that they had not conducted life-cycle cost studies for ice-hardening existing ships because there is no capability requirement for an ice- hardened ship and, therefore, no ship design on which to base such a study or estimate. Furthermore, the June 2018 report states that the Navy is leveraging cooperative research with international partner-nations such as Canada, Denmark, Finland, and Norway, to better understand how other Arctic nations are meeting additional requirements for Arctic operations. Navy officials from the Naval Sea Systems Command stated that ships built to operate in ice and extreme cold environments have unique features, including stronger, thicker construction of all portions of the hull that would come into contact with ice; different hull form design; redesigned propellers constructed of higher than traditional strength material; increased strength ship parts, such as rudders and seawater intakes and discharges designed to resist the formation or accumulation of ice; and more powerful heating and ventilation to accommodate sustained operations in extreme cold environments, among other things. They also noted that research completed to date has advanced the Navy’s knowledge in several of these areas including hull form and propeller design. Navy officials estimated that a new ship design might require 20 years to reach initial operational capability. They noted the process might take only 10 years if the Navy can leverage an ongoing program, such as the DDG-51 Class program. Navy officials cautioned that the combination of features that enable ice-capable ships to sustain operating in extreme cold environments could compromise other performance areas such as speed, range, and ship motion. Officials told us that this would add to the Navy’s already strained efforts to maintain existing global naval presence requirements. Although the June 2018 report did not discuss any cost and schedule adjustments that might arise from ice-hardening or new ship construction, we have previously reported that the Navy has faced challenges meeting its shipbuilding cost, schedule, and performance goals over the past decade. Specifically, we found that the 11 lead ships most recently delivered to the Navy cost $8 billion more to construct than initially budgeted for. Navy officials stated that the Navy contractor construction yards currently lack expertise in the design for construction of winterized, ice-capable surface combatant and amphibious warfare ships. Accordingly ice-hardening and winterization design practices could introduce cost and schedule risk, challenging the execution of an ice- hardened new construction ship building program for an ice-capable ship. If the Navy executes this potential program without the requisite knowledge at key points it could be at risk of cost and schedule growth that we have seen in recent Navy shipbuilding programs. The Navy has faced these challenges in part because the department has proceeded with construction prior to completing technology development and ship design. We have found that successful ship building programs are based on sound business cases, starting with the lead ship, and on the attainment of critical levels of knowledge at key points in the process prior to making significant investments. Navy officials said that the Navy does not currently have a specific capability requirement for ice-hardening existing vessels or for the construction of new ones, and stated that the Navy or Joint Force is unlikely to produce such a requirement in the near term. Navy officials told us that the Navy will continue to use DOD’s established process, the Joint Capabilities Integration and Development System (JCIDS), which governs the department’s requirements process, to assess Arctic-related capability requirements in the near and long term (see fig. 5). All DOD components use the JCIDS process or variations of the process within their organizations to identify, assess, validate, and prioritize joint military requirements. Before starting the JCIDS process, the military services, combatant commanders, and other DOD components conduct capabilities-based assessments or other studies to assess capability requirements and associated capability gaps and the associated risks. In October 2017, the Joint Requirements Oversight Council (JROC) validated U.S. Northern Command’s initial capabilities document identifying three gaps in the ability to exercise/deploy, position, and conduct deterrence/decisive operations in ice-diminished Arctic waters. At the time of our review, the JROC had reviewed and validated the U.S. Northern Command’s Arctic initial capabilities document and designated it for further study by the Navy. The validation of an initial capabilities document by the JROC is an early part of the JCIDS process, and informs updates to capability requirement documents related to specific materiel and nonmateriel capability solutions to be pursued. A Navy official stated that the capability gaps identified in the U.S. Northern Command’s validated initial capabilities document will now compete for resources with other issues designated for study across the Navy. According to a Navy official, whenever the Navy initiates a study, this triggers the analysis of alternatives phase of the JCIDS process. Under this process, each alternative would need to be specifically evaluated for its costs and benefits. DOD officials noted that there are several analytical steps in the JCIDS process during which potential solutions for any identified gaps are analyzed. They told us that potential solutions might also include alternatives other than ice-hardening or new ship construction, such as adding capabilities to Coast Guard ships or partnering with allies to achieve common strategic goals in the Arctic. Even as the seasonal ice decreases over time, according to Navy officials, the Arctic will remain impassable for most commercial ships for most of the year. For these reasons, projections of increased Arctic sea activity remain uncertain. DOD, U.S. Northern Command, Navy, and Coast Guard officials told us that even as Arctic maritime activity is expected to increase, several enduring characteristics will continue to provide challenges to surface navigation in the Arctic for the foreseeable future. These challenges include large amounts of winter ice and increased movement of ice from spring to fall. As mentioned earlier, the increased movement of sea ice makes its location less predictable, a situation that is likely to increase the risk that ships can become trapped or damaged by ice impacts. Coast Guard officials noted that a challenging environment like the Arctic may result in a higher likelihood of incidents occurring. Further, responding to incidents with search and rescue operations are riskier to execute than in non-polar environments. In addition, the lack of infrastructure and logistical support in the Arctic affects maritime activities through that region. We are not making any recommendations in this report. We provided a draft of our report to DOD, Department of Homeland Security, and the Department of State for comment. DOD, Department of Homeland Security, and Department of State provided technical comments, which we incorporated into this report as appropriate. We are sending copies of this report to the appropriate congressional committees. We are also sending copies to the Secretary of Defense, Secretary of State, and the Secretary of Homeland Security. In addition, this report will be available at no charge on our website at http://www.gao.gov. If you or your staff have questions about this report, please contact me at (202) 512-3489 or pendletonj@gao.gov. Contact points for our Offices of Congressional Relations and Public Affairs may be found on the last page of this report. GAO staff who made key contributions to this report are listed in appendix II. In addition to the contact named above, Suzanne Wren (Assistant Director), Delia Zee (Analyst-in-Charge), John Beauchamp, Mae Jones, Amie Lesser, Ned Malone, and Shahrzad Nikoo made key contributions to this report. Coast Guard Acquisitions: Polar Icebreaker Program Needs to Address Risks before Committing Resources. GAO-18-600. Washington, D.C.: September 4, 2018. Navy Shipbuilding: Past Performance Provides Valuable Lessons for Future Investments. GAO-18-238SP. Washington, D.C.: June 6, 2018. Coast Guard Acquisitions: Status of Coast Guard’s Heavy Polar Icebreaker Acquisition. GAO-18-385R. Washington, D.C.: April 13, 2018. Coast Guard: Status of Polar Icebreaking Fleet Capability and Recapitalization Plan. GAO-17-698R. Washington, D.C.: September 25, 2017. High-Risk Series: Progress on Many High-Risk Areas, While Substantial Efforts Needed on Others. GAO-17-317. Washington, D.C.: February 15, 2017. Arctic Planning: DOD Expects to Play a Supporting Role to Other Federal Agencies and Has Efforts Under Way to Address Capability Needs and Update Plans. GAO-15-566. Washington, D.C.: June 19, 2015. Climate Change Adaptation: DOD Can Improve Infrastructure Planning and Processes to Better Account for Potential Impacts. GAO-14-446. Washington, D.C.: May 30, 2014. Arctic Issues: Better Direction and Management of Voluntary Recommendations Could Enhance U.S. Arctic Council Participation. GAO-14-435. Washington, D.C.: May 16, 2014. Maritime Infrastructure: Key Issues Related to Commercial Activity in the U.S. Arctic over the Next Decade. GAO-14-299. Washington, D.C.: March 19, 2014. Managing for Results: Implementation Approaches Used to Enhance Collaboration in Interagency Groups. GAO-14-220. Washington, D.C.: February 14, 2014. Managing for Results: Key Considerations for Implementing Interagency Collaborative Mechanisms. GAO-12-1022. Washington, D.C.: September 27, 2012. Arctic Capabilities: DOD Addressed Many Specified Reporting Elements in Its 2011 Arctic Report but Should Take Steps to Meet Near- and Long- term Needs. GAO-12-180. Washington, D.C.: January 13, 2012. Coast Guard: Efforts to Identify Arctic Requirements Are Ongoing, but More Communication about Agency Planning Efforts Would Be Beneficial. GAO-10-870. Washington, D.C.: September 15, 2010. Alaska Native Villages: Limited Progress Has Been Made on Relocating Villages Threatened by Flooding and Erosion. GAO-09-551. Washington, D.C.: June 3, 2009.

Summary: The Navy is responsible for providing ready forces for current operations and contingency response in the Arctic Ocean. According to data from the National Snow and Ice Data Center, the coverage of sea ice in the Arctic has diminished significantly since 1981. This could potentially increase maritime activities there, leading to a need for a greater U.S. military and homeland security presence in the region. Public Law 115-91 required the Navy to report to Congress on the Navy's capabilities in the Arctic, including any capability gaps and requirements for ice-hardened vessels. It also included a provision for GAO to review the Navy's report. This report (1) assesses the extent to which the Navy's report aligns with current assessments of Arctic threat levels and capabilities required to execute DOD's 2016 Arctic Strategy and (2) describes any current requirements for ice-hardened vessels and DOD's approach for evaluating the capabilities needed as Arctic requirements evolve. GAO reviewed the Navy's report along with DOD's assessments of Arctic threats and naval capabilities. GAO also reviewed the 2016 DOD Arctic Strategy— the most current strategy, DOD and Department of State information on the freedom of navigation program as well as DOD's processes for developing capabilities and assessing Arctic capability gaps. GAO is not making any recommendations in this report. DOD provided written technical comments which were incorporated as appropriate. The Navy's June 2018 report aligns with Department of Defense (DOD) assessments that the Arctic is at low risk for conflict and that DOD has the capabilities to execute the 2016 DOD Arctic Strategy . The June 2018 report also aligns with assessments of Arctic capabilities and gaps in the Navy's 2014 roadmap for implementing the strategy. The June 2018 report states that the Navy can execute the strategy with subsurface, aviation, and surface assets. The report notes the significant limitations for operating surface ships in the Arctic, but states that the Navy has the capabilities required for executing the strategy , and so has no plan to design ice-hardened surface ships. In addition, DOD officials stated that the United States has options other than Navy surface ships for demonstrating the U.S. right to operate in the Arctic, including using Coast Guard vessels, Navy submarines, or military aircraft. Navy officials said that the Navy does not have a specific requirement for ice-hardening existing vessels or constructing new ones. The Navy plans to continue to use DOD's established process, the Joint Capabilities Integration and Development System to reassess Arctic-related requirements as conditions evolve (see fig.). In October 2017, the Joint Requirements Oversight Council validated U.S. Northern Command's initial capabilities document identifying three gaps in the ability to exercise/deploy, position, and conduct deterrence/decisive operations in ice-diminished Arctic waters. At the time of GAO's review, the Joint Staff had validated the capability gaps, which will now compete for resources with other issues designated for further study. Officials said additional study may identify alternative solutions such as adding capabilities to Coast Guard ships or partnering with allies to achieve common strategic goals in the Arctic.