Narrative:

I was training a developmental on local control during the morning cargo outbound; when we accepted a point out on an aircraft descending to 4000 feet. My developmental had two departures; one rolling; one holding short. The aircraft on the ground was issued 'climb via the SID; except maintain 3000 feet.' once aircraft was airborne; developmental said to aircraft X; 'climb via the SID; except maintain 3000.' aircraft X (garbled or stepped on response) was questioning whether to climb via the SID and not to 050. I said to my developmental; 'oh; I bet he was cleared via radar vectors; not the SID.'we have the option on clearance delivery to issue the prop aircraft vectors to first fix or SID. So; I had the developmental say; 'climb and maintain 3000; turn right heading 330.' the other aircraft then was issued a similar clearance; since clearance delivery said they had read the clearances with radar vectors not the SID that morning. The departure controller then experienced the confused pilot deviating from the 3000 foot assigned altitude and climbing into aircraft Y level at 4000 feet. Management was advised about the issue of not knowing on local control how flight data/ground control issued the clearance and not knowing what phraseology to use to amend an altitude.the SID is a worthless SID for all aircraft; but especially a prop aircraft; exempt from noise abatement procedures. I recommend immediately requesting all controllers issue one or the other. Either all of us shall issue the SID; or preferably; all of us shall use radar vectors when clearing these props (numerous cargo props this time of day). Long term; I think either the SID needs to be removed from our sids or the required phraseology to amend an altitude from local control should leave out the 'climb via SID; except maintain (altitude)' portion and simply be; 'maintain (altitude).' thank you for your time and attention to this; as this procedure most definitely contributed to a pilot deviation this morning; following by two aircraft in unsafe proximity to one another!

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Original NASA ASRS Text

Title: A departing BE99 aircraft assigned 3;000 feet climbed to 3600 feet conflicting with 4;000 foot crossing traffic.

Narrative: I was training a developmental on Local Control during the morning cargo outbound; when we accepted a point out on an aircraft descending to 4000 feet. My developmental had two departures; one rolling; one holding short. The aircraft on the ground was issued 'Climb via the SID; except maintain 3000 feet.' Once aircraft was airborne; developmental said to Aircraft X; 'Climb via the SID; except maintain 3000.' Aircraft X (garbled or stepped on response) was questioning whether to climb via the SID and not to 050. I said to my developmental; 'oh; I bet he was cleared via radar vectors; not the SID.'We have the option on Clearance Delivery to issue the prop aircraft vectors to first fix or SID. So; I had the developmental say; 'Climb and maintain 3000; turn right heading 330.' The other aircraft then was issued a similar clearance; since Clearance Delivery said they had read the clearances with Radar Vectors not the SID that morning. The departure controller then experienced the confused pilot deviating from the 3000 foot assigned altitude and climbing into Aircraft Y level at 4000 feet. Management was advised about the issue of not knowing on Local Control how Flight Data/Ground Control issued the clearance and not knowing what phraseology to use to amend an altitude.The SID is a worthless SID for all aircraft; but especially a prop aircraft; exempt from Noise Abatement procedures. I recommend immediately requesting all controllers issue one or the other. Either all of us shall issue the SID; or preferably; all of us shall use Radar Vectors when clearing these props (numerous cargo props this time of day). Long term; I think either the SID needs to be removed from our SIDs or the required phraseology to amend an altitude from Local Control should leave out the 'Climb via SID; except maintain (altitude)' portion and simply be; 'Maintain (altitude).' Thank you for your time and attention to this; as this procedure most definitely contributed to a pilot deviation this morning; following by two aircraft in unsafe proximity to one another!

Data retrieved from NASA's ASRS site and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.