![Submarine-launched ballistic missile tested Submarine-launched ballistic missile tested](http://tnpscgatewayy.com/wp-content/uploads/2020/01/Picture2-4-300x265.png)
- India successfully test-fired the 3,500-kmrange submarine-launched ballistic missile, K-4, official sources confirmed. The test was carried out by the Defence Research and Development Organsiation (DRDO) from a submerged pontoon off the Visakhapatnam coast around noon.
- INS Arihant, the first and only operational SSBN, is armed with K-15 Sagarika missiles with a range of 750 km.