Standard protocol is Sweden, even in 1994.
For example, the Finnbirch disaster, 1 Nov 2006. Here's the MRCC/ARCC helicopter rescue timeline:
Turvallistutkimust Page 63 pdf
Note these helicopters from Ronneby and Visby set off within ten minutes of being commanded to. This is because protocol states, 'within fifteen minutes'.
So we can be sure that in the Estonia case it certainly did not take until 0350 before the first Swedish helicopter arrived but makes perfect sense that Y64 and Y74 having received a command from MRCC Stockholm at 0202 were on their way by 0215 and when MRCC Turku notified Silja Europa the Swedes helicopters will be there 'in ten minutes' at 0227, it was being factually precise, if slightly optimistic, based ont he fact it was confirmed they were on their way.
This is when Ensign Svensson saved the eight who later went missing and were written out of the JAIC report and the Swedish Government Official Estonia Archives. Classified no doubt, as is the reason for their disappearance. So Ensign gets a Gold Medal with Sword, the highest Swedish Defense Forces Medal of Merit instead, to keep him sweet.
Do you really think Sweden's MRCC is going to take two hours to rescue its own citizens in distress?
ibid