Israel’s sixth submarine has arrived, but security officials are asking for more submarines, more ships and additional capabilities, Prime Minister Benjamin Netanyahu said during a visit to the Ashdod naval base Sunday alongside Defense Minister Israel Katz.

“The maritime arena has effectively become an international battlefield,” Netanyahu said, pointing to the Strait of Hormuz and Bab el-Mandeb. He warned that Israel’s enemies want to threaten its Mediterranean waters, ports and shipping routes.

“Of course, we will not let that happen.”

Netanyahu and Katz received briefings on the navy’s southern operations and inspected weapons and equipment used for defense and attack. Netanyahu declined to elaborate on some of the additional capabilities security officials are requesting.

“In this area too, above and below the surface, I intend for Israel to be one of the world’s leaders in this field of warfare,” he said. “We will also defend Israel from the sea.”