C1/D (Merchant Marine) Visa Holder Entry in the US: Being selected for Secondary Screening & interview

1. There is (or at least should be) a random selection in addition to any kind of doubt for secondary screening where they just pull someone to talk with or look at their papers.

2. The secondary screening includes things you don't see, e.g. someone calling your employer, your agent or someone else that may have something to do with you. In this case the officer may talk with you about the weather, the Greek gods or whatever just waiting their colleagues to finish whatever hidden checks they may do.

3. They may be looking for a particular pattern related to operative information about recent or upcoming event - e.g. "all marine-related people" (pretty much likely in your case) or "all family pairs without children", etc, etc...

There are also other reasons for someone to be pulled for a secondary screening, completely unrelated to doing something wrong.

If this is the first time you get secondary screening in almost 30 years, you are lucky.

Just be patient.

So, they thought I was dishonest and a security risk.

That's quite a stretch. Personally, I was once sent to secondary because the officer got annoyed with me. There wasn't even an interview. They made me wait for half an hour, gave me my passport, and let me go.

For a long time, I always got sent to secondary inspection when arriving in the USA. Some times I was cleared in less than 5 minutes, and sometimes it took more than an hour.

I started asking the inspectors why I got sent to secondary screening. Some wouldn't say anything, but the ones who did, told me I was a "name match".

It turns out that I have a relatively common name, and US law enforcement seemed to be looking for somebody with my same name and birthday. They were just making sure I wasn't the person they were looking for.

When I applied for Global Entry a few years later, this topic came up in the interview. They accepted my application, and I haven't gotten sent to secondary ever since.

I'm not trying to say this is exactly why you got sent to secondary. Only the inspector knows the reason. What I want to say is that it's perfectly possible for you to get sent to secondary, even if you haven't done anything wrong.

My suggestion is not too think too much about it, and if you see you are getting sent to secondary more often than you'd like, you may want to consider applying for a DHS redress, which can help alleviate situations like these.

It's common for all persons holding certain classes of visas/statuses to be sent to secondary inspection. Advance parole is another one where everyone gets sent to secondary as a matter of policy. These people aren't necessarily considered to be more of a security risk; it's just that CBP decided to process all of them in secondary instead of primary inspection.

yet they thought I was "dishonest and a security risk."

Unlikely. CBP can pull anyone into secondary for any reason or no reason at all. Since it wasn't just you, chances are someone decided to inspect all marine merchants in secondary that day. Maybe there was tip off, maybe someone just felt like doing this for whatever reason.

at no point was ever any US uniformed personnel impolite, condescending, hostile or threatening

That's also a clear indicator that there was no issue at all with you as an individual. If they had any suspicion, you would have gotten a very different treatment.

When I was on "advanced parole", I had to go to secondary on a regular basis: while some officers were courteous and professional, others were rude and abusive. I've seen some blatantly illegal things happening there. If there is any real suspicion, you know it!

So, they thought I was dishonest and a security risk.

Or maybe they just found "a problem that couldn't be resolved quickly," which is also mentioned in the material you quote. For example, there could be a policy of confirming the details of the ship that the crew member is joining. If the ship is to be in US waters for more than 29 days then C-1 status, which has a maximum 29-day period of admission, is insufficient.

It's not exactly clear from the CBP Inspector's Field Manual what they were doing (the document is old, but contemporaneous with the events described in the question). But from the lack of animosity reported in the question, it seems far more likely that the treatment you and your fellow merchant mariners received was not the result of some antipathy toward crew who are joining a vessel but rather was some routine bureaucratic requirement that was impractical to undertake at the primary inspection desk.