The agreement was signed aboard the Polish frigate ORP General Tadeusz Kościuszko during Polish-Swedish intergovernmental talks in the Baltic port of Gdynia.
Under the agreement, Poland will acquire three A26-class submarines built by Sweden's Saab Kockums shipyard.
Military analysts say the purchase will significantly strengthen Poland's position as a leading maritime force in the Baltic region.
As part of the deal, Sweden will also provide Poland with a submarine for training purposes and purchase the Polish-built Ratownik rescue vessel.
The diesel-electric Blekinge-class submarines are equipped with air-independent propulsion, allowing them to remain submerged for extended periods without surfacing to recharge their batteries.
They will replace the aging ORP Orzeł, Poland's only submarine in active service.
The first vessel is scheduled for delivery in 2030, with the remaining two to follow in subsequent years.
Poland's Orka submarine procurement program is estimated to cost around PLN 20 billion (EUR 4.66 billion, USD 5.3 billion).
In addition to the submarines themselves, the contract covers training, logistics, supporting infrastructure and industrial cooperation between Poland and Sweden.
Warsaw selected Sweden as its preferred partner for the procurement program in November.
The two countries also signed an intergovernmental agreement establishing a framework for future defense procurement, along with a separate agreement setting out the legal and organizational framework for Sweden's purchase of the Ratownik rescue vessel, which is being built in Poland.
Monday's consultations, led by Polish Prime Minister Donald Tusk and his Swedish counterpart Ulf Kristersson, focused on European security, cooperation within NATO and the European Union, the situation in the Baltic Sea and continued support for Ukraine, according to the Polish Prime Minister's Office.
Officials said the talks were held under a renewed strategic partnership signed by the two countries in Harpsund, Sweden, in November 2024, replacing a 2011 agreement.
The updated partnership, concluded after Russia's full-scale invasion of Ukraine and Sweden's accession to NATO, focuses on the integrated defense of the Baltic Sea, protection of critical infrastructure and countering Russian hybrid threats.
(pu/gs)
Source: PAP
Click on the audio player above for a report by Piotr Urbaniak.