The activists acknowledged they had used the "much-needed distraction" created by the Pog to help keep the travels of the flotilla co-founders and West Papuan leaders to the pre-arranged meeting place undetected.
They said the meeting was held "recently" but said specifying the particular day could "risk (the) lives" of West Papuans who attended or assisted.
A spokesman said the decision to hand over the waters and ashes this way was made following statements made by the Indonesian military against the Pog.
The Pog is still edging closer to Indonesian territorial waters, with the sailors attempting to make contact with officers of the Indonesian navy prior to any confrontation because of concerns for their safety.
Flotilla spokesman Ruben Blake told The Australian the Indonesian military had been making "ambiguous" statements and had not ruled out a violent response to the yacht's arrival or the use of "lethal force".
The Pog has entered Indonesia's Exclusive Economic Zone and remains on course for the port city of Merauke in Papua.
The vessel, however, is yet to enter Indonesia's "territorial waters", an area that extends 12 nautical miles from the coastline.
Freedom Flotilla spokeswoman Izzy Brown told AAP today that the Pog was about 70 nautical miles from Papua and still heading for the Indonesian mainland, but that progress was slow due to wind conditions.
It could be another 24 hours before the vessel reached the "territorial waters".
"We crossed the Indonesian water border (the EEZ) at about midnight (1am AEDT) last night and we're heading to Merauke," she said via satellite phone from the yacht.
The group was warned by the Indonesian navy again today to change course and abandon attempts to reach Merauke.
