| U.S. government document producer | 33 |
| Sen. publisher | 14 |
| Postmaster's post: Abbr. | 28 |
| Postmaster's HQ | 19 |
| Place to find ltrs. in boxes | 28 |
| Org. that produces the Congressional Record | 43 |
| Main mailbox locale: Abbr. | 26 |
| Mailing sta. | 12 |
| Mailing abbr. | 13 |
| Mail-sorting HQ | 15 |
| Mail sorting ctr. | 17 |
| Mail hub: Abbr. | 15 |
| Ltr.-mailing location | 21 |
| Ltr. center | 11 |
| Local mail H.Q. | 15 |
| Govt. publishers | 16 |
| Gov't public agency | 23 |
| Fed. publishers | 15 |
| Fed. pamphlet producer | 22 |
| Fed. documents producer | 23 |
| Delivery notation: Abbr. | 24 |
| Concern of Sec. J. Farley | 25 |
| Central mail bureau | 19 |
| Bldg. with boxes | 16 |
| Driver's aid | 16 |
| Navigation aid | 14 |
| Family docs | 11 |
| Docs | 4 |
| Modern navig. tool, or alternative title for this puzzle | 56 |
| Some Drs. | 9 |
| Dash device | 11 |
| Feature of some watches | 23 |
| Family MDs | 10 |
| Certain Drs. | 12 |
| Tracking letters | 16 |
| Some MDs | 8 |
| Rte. finder | 11 |
| Navig. aid | 10 |
| Nav. system | 11 |
| Certain M.D.'s | 18 |
| SUV option | 10 |
| Some M.D.'s | 15 |
| Location finder, briefly | 24 |
| Family M.D.'s | 17 |
| Family drs. | 11 |
| Traveler's aid, for short | 29 |
| Technology heavily used in geocaching | 37 |
| St.-finding aid | 15 |
| Some MD's | 13 |
| Some family docs | 16 |
| Some docs | 9 |
| Some AMA members | 16 |
| Satellite navigation letters | 28 |
| Rte.-display gadget | 19 |
| Rental car feature, briefly | 27 |
| Navigational tracker | 20 |
| Navigational gizmo | 18 |
| Navigation device, briefly | 26 |
| Modern navigation aid, familiarly | 33 |
| Modern navig. tool | 18 |
| It helps you when you're going places (abbr.) | 49 |
| HMO listing | 11 |
| Feature of some high-tech cell phones | 37 |
| Fam. doctors | 12 |
| Colorful nav. tool | 18 |
| Certain doctors: Abbr. | 22 |
| Car navigation aid: Abbr. | 25 |
| Auto rental option | 18 |
| Auto navigation aid: Abbr. | 26 |
| Aid for lost souls, briefly? | 28 |
| Way to find your way: Abbr. | 27 |
| Trip guide, for short | 21 |
| Tracking aid: Abbr. | 19 |
| TomTom or Magellan unit, for short | 34 |
| Thing that gives directions | 27 |
| They're not specialists: Abbr. | 34 |
| Talking dash item | 17 |
| Talker on long car trips: abbr. | 31 |
| Space-based navig. tool | 23 |
| Smartphone app | 14 |
| Scarce physicians: abbr. | 24 |
| Satellite-based navigation aid, in brief | 40 |
| Satellite-based navigation aid, for short | 41 |
| Rental car extra, for short | 27 |
| Rental car extra (abbr.) | 24 |
| Rental car add-on, in brief | 27 |
| Rental car add-on | 17 |
| Rd. map displayer | 17 |
| Portable mapping device: Abbr. | 30 |
| Popular smartphone app | 22 |
| Point pinpointer: Abbr. | 23 |
| One telling you where to get off, for short? | 44 |
| Non-specializing MDs | 20 |
| Navigational tracker (abbr.) | 28 |
| Navigational tool, for short | 28 |
| Navigational gizmo, for short | 29 |
| Navigational device, for short | 30 |
| Navigational aid, for short | 27 |
| Navigation help (abbr.) | 23 |
| Navigation gizmo | 16 |