Date: 202104
Local time of day: 0601-1200
Location: LGA.Airport, NY
Flight conditions: IMC
Weather elements / visibility: 0.25
Light: Daylight
Aircraft: Commercial Fixed Wing
Operator: Air Carrier
Operating under: Part 121
Flight plan: IFR
Mission: Passenger
Flight phase: Taxi
ATC / advisory: Tower LGA
Reporter organization: Air Carrier
Reporter function: Pilot Flying; Captain
Reporter qualification: Flight Crew Multiengine; Flight Crew Instrument; Flight Crew Air Transport Pilot (ATP)
Human factors: Distraction; Workload; Situational Awareness; Confusion; Troubleshooting
Second reporter function: First Officer
Anomaly: ATC Issue All Types; Deviation - Track / Heading All Types; Deviation / Discrepancy - Procedural Clearance; Deviation / Discrepancy - Procedural Published Material / Policy; No Specific Anomaly Occurred Unwanted Situation
Detector: Person Flight Crew
When detected: Taxi
Result: Air Traffic Control Provided Assistance; Flight Crew Requested ATC Assistance / Clarification
Contributing factors: Chart Or Publication; Human Factors
Primary problem: Chart Or Publication

Narrative: Initial CPDLC clearance was SID La Guardia 7 Runway 13 Whitestone.  During taxi out Ground changed SID to the GLDMN 7. When you select GLDMN 7 as the SID; numerous complex special engine out procedures are available.  The first; and only engine out procedure; with GLDMN in it for 13 says 'GLDMN NTHNS.'  My FO (First Officer) asked Ground if we were cleared the GLDMN7 NTHNS Departure because of that title listed in the engine out procedure list.  Ground responded with 'It's just the GLDMN 7 RNAV Departure.'  Our confusion was we were originally cleared La Guardia 7 Runway 13 WHITESTONE; so with the change to the GLDMN 7 we were expecting WHITESTONE; and if not; then another transition such as NTHNS. We set the parking brake and informed Ground we'd need a few minutes to brief the new departure. As we further investigated the GLDMN 7; if you select the 'COMPLEX Special EFP Runway 13 GLDMN NTHNS' engine out procedure; it shows the title as 'Runway 13: GLDMN Departure; NTHNS Departure.'  This clearly shows GLDMN and NTHNS and separate departures; not GLDMN Departure with a NTHNS transition.  There absolutely needs to be a Jeppesen title change there either adding a separating comma between GLDMN and NTHNS; or just list them in two separate lines.  For such a simple punctuation mark missing; it took a radio call (which didn't clear up our confusion; and further investigating to clear things up for us).  Either way; we set the brake to brief the change and accomplish the Departure Plan Checklist.  We departed with no issues after that chart confusion.  This report is to support that title change.


Second narrative: During taxi out for departure from LGA; ATC assigned us a new departure from our original clearance of LA GUARDIA 7 WHITESTONE for Runway 13. The new clearance was to depart on the GLDMN 7 for Runway 13. Pulling up the procedure was easy to do; along with programming the FMC. But; the safety concern was that the emergency departure labeling in the Jeppesen Charts was confusing. We requested; for some time; for Ground Control to brief the procedure and to get clarification about the assigned departure.  In the Jeppesen charts; it looks like the emergency procedure is with a NTHAN transition; which we were not assigned; because such a departure doesn't exist. We quickly realized that the NTHAN is a separate departure entirely. We noticed the confusion was because the separate departures were not differentiated with the usual ';' (comma); like at other airports. We then made sure we were on the same mental model and briefed the departure with the appropriate emergency procedure; ran the Departure Plan Checklist and continued on without incident.


Synopsis: Air carrier Captain reported confusion with the LGA airport La Guardia 7 SID engine out procedures.