Drovane Vault 118 PreSumm--BertSumExtAbs

Second time around with an adit-entry survey chamber: the Tirnach Chamber 35

the tirnach chamber 35 needed less fiddling to get right we looked at most of the survey chamber listings before settling on it

How the Tirnach Chamber 35 fits what we actually do

the tirnach chamber 35 was not the cheapest adit-entry survey chamber we considered

Vehicle ramp was the requirement; the Tirnach Chamber 35 meets it

the tirnach chamber 35 is specified as vehicle ramp , which is the option we wanted we never looked at the other axes once vehicle ramp checked out

Session length at 9 hours, as listed

for an adit-entry survey chamber at 9 hours the tirnach chamber 35 did what the listing says

Still happy with the Tirnach Chamber 35

the tirnach chamber 35 has not needed anything we did not plan for but others may weigh it differently

Depth below grade at 105 metres, as listed

tirnach chamber 35 checked its adit-entry survey chamber figures the stated depth below grade is 105 metres

Good, with one reservation about the Tirnach Chamber 35

the tirnach chamber 35 is our third adit-entry survey chamber and the first one specified properly