XSL Pass node-set to template

WinXP, MSXML 4/.NET.

The basic goal is to pass a node set to a template (see below)
<?xml version="1.0" encoding="utf-8" ?>
<flights>
      <flight number="101" line="AQ" time="2004-05-17T11:12:00" type="A">
            <values field="gate">B12</values>
      </flight>
      <flight number="102" line="AQ" time="2004-05-17T12:12:00" type="D">
            <values field="gate">B12</values>
      </flight>
            <flight number="103" line="AQ" time="2004-05-17T13:12:00" type="A">
            <values field="gate">B12</values>
      </flight>
            <flight number="104" line="AQ" time="2004-05-17T14:12:00" type="D">
            <values field="gate">B12</values>
      </flight>
</flights>

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Within 1 hour from now: (select only top 1 arrival/departure (type=A/D)where gate='B12')

If there are NO Arriving/Departing
      display "No Flights"
      
If Only Arriving
      Display "Flight (line + number) is Arriving..."
      
If Departing & Arriving
      Display "Flight (line + number) is Departing ..Flight (line + number) is Arriving"
                  
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What I'd like to do is use a departure template with an arrival node-set as a parameter.
Then when processing the departure node, use a template for the arrival processing. I *think* the msxsl:node-set function is what I need, but can't find the right answer on the web.

I have simplified both the XML and logic. There is a lot more going on in the
data selection and the presentation logic, but this should do.