This issue has also been concerning me.

You may find this link helpful: https://schismatic-home-aloner.com/no-jurisdiction-position-audios/

Also, Eric Hoyle is a liar and an apostate: https://schismatic-home-aloner.com/eric-hoyle-epic-apostasy/

A good question to ask these people is, did St. Vincent Ferrer have jurisdiction? If they are consistent, they will say no.

My issue is the lack of proof for jurisdiction being supplied to trad priests objectively. I am unsure how it'd work with my current situation though since I believe it is possible the SSPX have delegated jurisdiction from Francis since I am unsure about SVism. 

My issue is the lack of proof for jurisdiction being supplied to trad priests objectively. I am unsure how it'd work with my current situation though since I believe it is possible the SSPX have delegated jurisdiction from Francis since I am unsure about SVism.

Try to remember that the end reason or main reason for the law that governs priestly faculties / jurisdiction is for the good of the faith, for the good of souls and for our salvation, and why in Her wisdom, Holy Mother the Church allows for "supplied jurisdiction" in emergencies.

We've been in an emergency for 60 years. The emergency is spiritual and it is worldwide, it is a crisis or an emergency of the faith, not of the body.

We must go to priests we know are valid and orthodox in the Catholic faith who can absolve our sins. If you cannot find one who is both, then find one you know is valid and ignore his unorthodox council in the confessional. Due to the crisis, the Church supplies his jurisdiction even when the bishop and pope forbid it, or just won't grant it to them, so do not worry about that.

In a nutshell, the laws were established to insure that the faithful were not fooled by fake, censured, or otherwise heretical priests ("false prophets") preaching false doctrines while impersonating or masquerading as Catholic priests. In this law the faithful could be confident that the priests were authentic because they were sent from their bishops, who was himself appointed to rule the diocese by the pope.

The situation in the Church since V2 has the faithful conditioned to wrongfully believe they should avoid trad priests for the Mass and sacraments because trad priests are refused jurisdiction, and on that account do not have the faculties to do their priestly duties, this is wrong. The truth is that we should thank God for providing us with the few faithful priests we have, and for supplied jurisdiction - which is a part of the law.

Thank you, I have listened to the audios by MHFM about jurisdiction and also read their PDF on the issue. But they do not seem to refute Hoyle's position. Their main argument is St. Vincent Ferrer and also the fact that Cessation of Law or Epikeia may lead to supplied jurisdiction. Both of these are covered extensively by Hoyle, including the issue of St. Vincent Ferrer (on page 101 of this PDF: https://drive.google.com/file/d/1o8W83eU33_Ei-DE1MBf8O9xOSzxRqX5A/edit). Epikeia/cessation of law are covered on page 95.
In short, St. Vincent was supplied jurisdiction on account of common error. Nowadays there is no such common error, because nobody believes sedevacantist priests to have titles with ordinary jurisdiction attached to them.

If a priest is on a ship at sea, does he have no jurisdiction to hear confessions, because nobody believes him to have ordinary jurisdiction?

Be careful of those that push home-aloneism.  They will leave you without sacraments.

If a priest is on a ship at sea, does he have no jurisdiction to hear confessions, because nobody believes him to have ordinary jurisdiction?

No, he can have jurisdiction according to canon 883 under the circuмstances specified in that canon. Jurisdiction supplied to priests on a ship does not stem from common error.

No layman is required to know canon law and where jurisdiction comes from.

As a simple layman, you need to know your catechism and obey your superiors.

If your grandma can't understand it, you're not required to either.

I would strongly suggest not reading Home Aloner materials because of this principle.

Think about this as well: If their position is true, no man on Earth can have a priestly vocation from God since he wouldn't call them to the impossible.

Don't deprive yourself of the sacraments.

Yes, this. ^^ It really is this simple.

As important as jurisdiction is, salvation is the most important.