The PDA goes out. A day passes, nothing. Two days, still nothing. You know the client isn't ignoring you on purpose, they've replied to your last three emails within hours. So why does the approval email specifically sit there unanswered? It's rarely disinterest. It's almost always friction, and the friction is built into the format.
The Problem
A PDA sent as an email attachment asks the client to do more than "approve." It asks them to open the attachment, read every line, decide how they want to signal approval, whether that's a reply, a signature, a stamped scan, and then actually produce that response. Each one of those steps is a small decision point, and small decision points are exactly where things get deprioritized. Not refused. Deprioritized. Pushed to "I'll deal with this later," and later has a way of becoming next week.
This gets worse when the principal is reviewing on a phone, which, for a lot of shipping decision-makers travelling or working from a vessel's owner's office, is often the case. A PDF attachment on mobile is genuinely unpleasant to review. Pinching to zoom on line items, switching apps to reply, trying to remember what format the agency actually wants the approval in. None of this is hard exactly. All of it adds friction, and friction is what turns a same-day approval into a five-day one.
And every day the approval sits unconfirmed, the agency is exposed. Work often has to start on a port call before formal sign-off, because the vessel doesn't wait for email etiquette. That means agencies frequently operate in a gap between "work is happening" and "the client has actually agreed to pay for it," and the size of that gap is set entirely by how easy the approval was to give.
Why It Persists
Nobody designed the PDF-attachment approval process on purpose. It's the default because email is the default channel, and PDF is the default document format.
The ask is bigger than it looks. "Just approve the PDA" sounds simple, but the actual sequence of steps required, open, review, decide, respond, is more than most people will do in one sitting, especially on mobile.
There's no clear single action. A reply-all email thread doesn't have an obvious "yes, approved" button. The client has to invent their own version of approval each time, which adds hesitation.
The Fix
The fix isn't chasing harder. It's shrinking the ask down to the one action that actually matters: a single tap that says "approved," on a link that opens clean on any device, no login, no attachment, no deciding how to format a reply.
When the entire approval fits in one obvious action, the friction that turns a same-day yes into a five-day delay mostly disappears. The client still reviews the same numbers. They just don't have to fight the format to tell you they're good with it.
This is exactly what QUAYLINE's client approval portal does: a secure link, the PDA laid out clean on mobile or desktop, one button to approve. No account, no attachment, no ambiguity about what "approved" looks like.
What To Do About It
If PDAs are sitting unanswered for days at a time, it's worth separating the two possible causes: is the client actually unsure about the numbers, or is the approval process itself the obstacle? More often than agencies expect, it's the second one, and it's the easier one to fix.
A shorter approval loop doesn't just speed up individual vessel calls. It shrinks the window where an agency is working without confirmed sign-off, which is where real financial risk sits.