Of course you can find all the traditional Russian souvenirs for sale in St Petersburg – matryoshki, lacquered boxes, scarves, wooden toys, samovars, vodka - and you'll be expected to bring some of these home.
But if you're looking for something more original, there are plenty more options too.
The unique system, designated as Garmoniya, is based on special submarine-carried robotized submersibles setting up sensitive sonars on the seabed.
Deep below the surface, the sonars extend their fixed multi-element and seabed hose antennas, the latter being many meters long.
A state-of-the-art sonar system to protect Russia’s territorial waters in the Arctic is already under development, the newspaper Izvestia quoted a Russian Defense Ministry source familiar with the situation as saying.
The source said that “the project is due to be finalized in 2017 and after it is approved by the Russian Defense Ministry, the new sonar system will enter service.” According to the source, the fully deployed system can cover an area spanning hundreds of square kilometers.
Amber from the Baltic, caviare from the Caspian, fur hats and coats from the heartlands of Siberia, Soviet memorabilia such as badges or posters, military belts and hats, commemorative coins, icons and antiques - all make interesting and unique souvenirs for yourself or loved ones.
Many of the international chain stores are represented in the city too, and the shopping malls are extensive and include non-shopping entertainment too, such as restaurants, cinemas and bowling.
Valued at €8.3-billion, India's biggest submarine procurement to date, P-75I is set to scale-up the Indian Navy submarine warfare capabilities.
The effects of restraints on the Russian Navy’s rearmament plans will be more severe, however, the upgrade of the submarine forces will continue, writes the online media outlet
While official Chinese media have been quite reactive and open with the launched of the People's Liberation Army Navy (PLAN or Chinese Navy) first Type 055 Destroyer (they did publish official images of the ceremony just two hours after it took place), details on the specifications of the ship, especially its sensor suite, are still scarce...
On order from the control center, the seabed station retracts its antennas, releases the comms buoy and gets back to the submarine. Hence, they will be reusable,” military expert Dmitry Boltenkov says.
In expert opinion, individual elements of the Garmoniya have become operational, and the whole system is due to achieve the full operational capability in 2020 at the latest.