SNMCMG1 units conducted a port visit to Tallinn Estonia, from Thursday 17th June to Monday 21st June 2010. During this period, the Deputy Chief Of Staff Support, MC Northwood, Rear Admiral Marek Kurzyk visited the Group. Estonian Deputy Minister of Defence, the Commander of Estonian Defence Forces and Estonian Maritime, Air and Land Component Commanders also attended a reception onboard Flag Ship on Friday 18th June 2010.

From Monday, 07th of June to Thursday, 17th of June SNMCMG1 units participated in international exercise BALTOPS 2010. Ships operated in Hara Bay (Gulf of Finland) whilst conducting clearance operation. Although it was exercise minehunters have found and countermined few live sea mines and other underwater explosive ordnances came from IIWW.

HMS PENZANCE, the second British minehunter to join the group in 2010, arrived in Gdynia on 05 June 2010 where she conducted a handover with HMS WALNEY before sailing with SNMCMG1 to participate in BALTOPS 2010.

The British minehunter HMS WALNEY over 118 days has conducted operations and exercises as part of SNMCMG1. She has taken part in 4 live operations and 3 exercises including Brilliant Mariner 2010. The British unit detached from SNMCMG1 on Monday 7th June 2010 in Gdynia Naval Base, Poland, on completion of her assignment to SNMCMG1.

Standing NATO Mine Countermeasures Group One takes part in the largest multinational peacekeeping operation in the Baltic Sea. One of the main tasks for the Group during the exercise is to ensure safety of navigation on essential sea lanes of communication. The sea-phase of BALTOPS 2010 has just begun.