[p7p8]

P.S. What does [spoiler] mean?

I thought you used trigger from your description but your mission had only 2 submarines (and nothing more)

You can open in editor missions others designers for learning purposes.

Your scenario is here:

 

VERSION 3
OWNALLIANCE 0
DIFFICULTY 2
TOTALNUMSIDES 2
NUMDRIVEABLES 1
MONTH 1
WORLDGRID 2
LATLONG 35.181370 -20.267483
;
SEASTATE 3
MDR 0 0 0
BOTTOMTYPE 0
TIMEOFDAY 12
WEATHER 0
CLOUDHEIGHT 4500
SSP 0
PEACETIMESIDE 2
PEACETIMESIDE 3
PEACETIMESIDE 4
PEACETIMESIDE 5
DESCRIPTION
BEGINTEXT
Against an Akula
ENDTEXT
MISSIONTITLE
BEGINTEXT
Tucson 1-1 with Akula
ENDTEXT




ENTITY 54 SUBENTITY
HULLID 1
ALLIANCE 0
POS 612738.562500 592376.750000 -369
POINTS 1000
COURSE 0
SPEED 3
PROB 100
DRIVEABLE 1
PLAYERTASKING
BEGINTEXT
kill the Akula and get a case of cold beer
ENDTEXT
STREAMTA 1
UNIQUENAME "Tucson"
COMMSINTERVAL 0.000000
TACTIC RANDOMBOX
TACTICTARGET 3 1
BOX 598217.187500 606898.125000 627260.000000 577855.375000
AIRLOADOUT 64
END

ENTITY 1529 SUBENTITY
HULLID 3
ALLIANCE 1
POS 599637.750000 603425.625000 -426
POINTS 750
COURSE 0
SPEED 5
PROB 100
UNIQUENAME "SSN 480"
COMMSINTERVAL 0.000000
TACTIC RANDOMBOX
TACTICTARGET 1 1
BOX 587483.937500 614158.875000 611791.562500 592692.437500
AIRLOADOUT 251
END

GOAL 577681.062500 597602.812500 0.000000
BEGIN
GOALNAME "Kill Akula"
GOALID 1
PARENTGOALID -1
GOALTYPE 2
DAMAGE 100
TRIGGERTYPE 2
STARTTIME 0
ENDTIME 0
POINTS 100
MAXSPEED -1
MINDEPTH -1.000000
MAXDEPTH -1.000000
RETURNTOBASE 0
CRITICAL 1
AUDIO E_Misc_06.wav
ATTACHEDTARGETOBJ 3
OBJTOPROSECUTEENT 54
MESSAGETYPEID 1
MESSAGETOHULLID 1
BEGINTEXT
Mission completed, report for debriefing.
ENDTEXT
END