1. The Kerch blockade is a limited operation that advances Russian sea command objectives in Black Sea. The Ukrainian Navy, now contained to Odessa as the remaining major port, will permanently lose the ability to operate in the Azov Sea. By further isolating the port of Mariupol, Russia is weakening Kyiv’s supply lines to Eastern Ukraine. While there is no immediate danger of a large-scale Russian land offensive, continued acts of maritime aggression have to be expected.
2. The Kerch blockade forces the Ukrainian Navy into a uniquely vulnerable position. Isolated in Odessa, the Ukrainian fleet could be annihilate by the Russian Navy and Aerospace Forces within days. Kyiv therefore requires a credible deterrent to prevent and counter further Russian attacks at sea. The Trump administration’s transfer of Javelin anti-tank missiles to Kyiv in April 2018, has already raised the stakes for Russia to intervene in Eastern Ukraine considerably. A similar solution is now needed for the navy.
3. A feasible short term solution to safe the Ukrainian Navy would be the acquisition of Boeing’s advanced anti-ship missile (ASM) Harpoon (Block II or above). The Harpoon belongs to the most advanced current generation of over-the-horizon ASM weapons. It can be launched from aircraft as well as surface and subsurface vessels. The Block II version has a range of 124 km, while the 2015 Block II Extended Range (ER) can engage targets in a 248 km radius thanks to its improved turbojet engine. The missiles travel with subsonic speed at sea-skimming altitude to avoid radar or infrared detection. The Harpoon’s 221 kg warhead is constructed to inflict terminal damage on enemy vessels. Both version are adequate given the expected engagement range in the Black Sea. One Block II missile has an estimated cost of over $1 million.
4. Ukraine’s total defense budget for 2018 runs to $600 million, which encompasses expenses for all branches of the armed forces as well as research and development programs. However, the U.S. Department of Defense’s budget has allocated up to $200 million to enhancing Ukraine’s defence capabilities, including coastal and maritime assets.
5. The purchase of a small number of Hapoons is thus feasible and would have immediate effects. In the longer term, Kyiv should also strive to build or acquire multirol corvettes and operationalize the Ukrainian-made long-range ASM “Neptune.”