Title: CPDLC - Missing Uplink Message Element 200

PDR Reference: 				97060013
Originator Reference: 			200MSGPDR
SARPs Document Reference: 		CPDLC SARPs, Section 2.3.7.6 Table 2.3.7-16. 
Status: 					ADOPTED
PDR Revision Date: 			25/08/97 ("Summary" section expanded)
                                   			 18/08/97 (ACCEPTED->PROPOSED)
						20/10/97 (PROPOSED -> RESOLVED)
PDR Submission Date:			27/06/97
Submitting State/Organization: 		ATNP WG3/SG2
Submitting Author Name: 		Hamelink, J 		
Submitting Author E-mail Address: 	Jhamelin@adsystech.com
Submitting Author Supplemental 
Contact Information:
SARPs Date:					IV1.1, March 97
SARPs Language: 				English

Summary of Defect: 
CPDLC Uplink message element 200 was inadvertantly deleted out of 2.3.7 of the CPDLC SARPS.  These defects were submitted to Phuket and were accepted, but were inadvertantly deleted.  They are in the red-lined input to Phuket.  
All message elements require attributes, so those should be re-added.  
Message 200 in particular (prior to Phuket, was one of the redundant free text message elements. In January the ADSP decided to allow only 1 or 2 levels in any message element using the level variable.  
Prior to this the requirement had been to allow 0, 1 or 2.  
It was decided that allowing 0 levels in all cases but 1 was operationally non-sensible, and moreover could have adverse safety implications.  
The case where the ability to specify 0 level was required was in the REPORT REACHING message.  
This is an operational currently available in the voice environment, and s condition.  
The requested modifications to the message set are consistent with the ADSP Manual.

Assigned SME: 				Sub-Volume II SME

Proposed SARPs amendment:

Modify table 2.3.7-16 (Additional Messages (uplink)) from

	MessageIntent/Use	Message Element	URG	ALRT	RESP
199				[free text]	N	L	N
201	Not Used				L	L	N

to

	MessageIntent/Use	Message Element	URG	ALRT	RESP
199				[free text]	N	L	N
200	Used in conjunction 	REPORT REACHING	N	M	R
	with a level clearance
	to report reaching the
	level assigned.
201	Not Used				L	L	N
	
SME Recommendation to CCB: 	        -	

CCB Decision:				CCB-2(Langen): ACCEPTED
					atnp_ccb_chair: RESOLVED (20/10/97)