| Dot, dot, dot, dash, dash, dash, dot, dot, dot | 46 |
| Dit-dit-dit-dah-dah-dah-dit-dit-dit | 35 |
| Distressing letters found 9 times in this puzzle | 48 |
| Desperate plea | 14 |
| CQD replacer | 12 |
| Coast Guard alert | 17 |
| Certain smoke signal | 20 |
| Castaway's message | 22 |
| Call in a watery calamity | 25 |
| Brand spelled with two (not three) dots | 39 |
| Brand owned by Clorox | 21 |
| Brand found in the kitchen | 26 |
| Andrea Doria signal | 19 |
| Alert asea | 10 |
| "Mayday" relative | 27 |
| "Mayday!" relative | 28 |
| "Mamma Mia!" number | 29 |
| "Help!" at sea | 24 |
| "Hel-l-lp!" | 21 |
| "Hel-l-l-lp!" | 23 |
| "Emergency!" | 22 |
| 'Help!,' asea | 21 |
| ''Mayday!'' | 27 |
| ... _ _ _ ... | 13 |
| Worshiping figure | 17 |
| What the USCG may respond to | 28 |
| USCG reception | 14 |
| USCG alert | 10 |
| Urgent transmission | 19 |
| Urgent call for help | 20 |
| Urgent appeal | 13 |
| Universal signal since 1908 | 27 |
| U.S.C.G. stimulus | 17 |
| U.S.C.G. call | 13 |
| Titanic's cry | 17 |
| Titanic signal | 14 |
| Titanic call | 12 |
| Three short, three long, three short | 36 |
| Terse radio message | 19 |
| Telegrapher's distress signal | 33 |
| Tapped-out message, often | 25 |
| Tapped-out message | 18 |
| Symbolic "help" | 25 |
| Sturdy pad | 10 |
| Stranded traveler's signal, perhaps | 39 |
| Stranded sailor's call | 26 |
| Sparks's plea | 17 |
| Sparks's last gasp | 22 |
| Sparks's frantic message | 28 |
| Sparks's frantic call | 25 |
| Sparks's desperate message | 30 |
| Sparks's desperate call | 27 |
| Sparks's "Help!" | 30 |
| Song sung by Sam and Donna in "Mamma Mia!" | 52 |
| Song in "Mamma Mia!" | 30 |
| Song from "Mamma Mia!" | 32 |
| Something to get a cutter's attention | 41 |
| Soap pad brand | 14 |
| Skipper's "mayday" | 32 |
| Six dits and three dahs | 23 |
| Sinking ship's signal | 25 |
| Sinking ship's call for help | 32 |
| Sinking ship signal | 19 |
| Sinking letters | 15 |
| Sinking feeling outburst? | 25 |
| Sinker's call | 17 |
| Signal when sinking | 19 |
| Signal that replaced "CQD" | 36 |
| Signal that had only existed for a few years when the RMS Titanic used it | 73 |
| Signal meaning ''help'' | 39 |
| Signal from the Titanic: April, 1912 | 36 |
| Signal from someone in trouble | 30 |
| Signal from a sinking ship | 26 |
| Signal for the USCG | 19 |
| Signal for immediate assistance | 31 |
| Signal for aid | 14 |
| Sig. for the shipwrecked | 24 |
| Ship's distress signal | 26 |
| Ship emergency letters | 22 |
| Seaman's call for assistance | 32 |
| Seaman's "911" | 28 |
| Sea captain's "Help!" | 35 |
| Scrubbing brand | 15 |
| Scary signal | 12 |
| Salt's 'Help!' | 26 |
| Sailor's "Mayday!" | 32 |
| Rihanna's first #1 Billboard single | 39 |
| Rihanna hit subtitled "Rescue Me" | 43 |
| Rihanna hit of 2006 or Abba hit of 1975 | 39 |
| Response to a sinking feeling? | 30 |
| Rescue party prompter | 21 |
| Pot-scrubbing brand | 19 |
| Plea for aid | 12 |
| Plea before going under | 23 |
| Palindromic signal | 18 |
| Palindromic hit song by the palindromic band Abba | 49 |
| Pad in the kitchen | 18 |
| Pad at a sink | 13 |
| Only hit song for which title and artist are both palindromes | 61 |
| One might be received on a bridge | 33 |