DefenseOne has a good review of the international law that Iran appears to have violated in seizing the Maersk TIgris.
Chuck Hill's CG Blog
DefenseOne has a good review of the international law that Iran appears to have violated in seizing the Maersk TIgris.
Chuck Hill's CG Blog 
A bit of clarification of “accompany” vice “escort” for what the Navy (and maybe the Coast Guard) is doing in the Straits of Hormuz. http://www.defenseone.com/threats/2015/05/whats-difference-between-accompanying-and-escorting-ship/111643/?oref=defenseone_today_nl
And an offer to extend a degree of protection to other nations’ shipping. http://www.defensenews.com/story/defense/international/mideast-africa/2015/05/03/us-navy-bolsters-presence-gulf-iran-seizure/26835345/
Have started accompanying British shipping. http://gcaptain.com/u-s-navy-ships-begin-accompanying-british-commercial-vessels-in-strait-of-hormuz/
Another take on the legality here: http://www.washingtonpost.com/news/volokh-conspiracy/wp/2015/05/03/irans-legal-claims-for-seizing-the-maersk-tigris/
And as Eaglespeak points out. They certainly have no reason to detain the crew. http://www.eaglespeak.us/2015/05/iran-strikes-back-ii-lawfare-and.html#comment-form
US Navy has reportedly stopped accompanying merchant ships through the Straits of Hormuz, although they will remain in the area. http://www.marinelink.com/news/accompanying-through390793.aspx
An analysis of why this happened. http://news.usni.org/2015/05/11/analysis-irans-latest-round-of-maritime-brinksmanship
Iran’s Revolutionary Guard Corp Navy attempts to stop a Singapore flagged ship. http://gcaptain.com/iranian-patrol-boats-fire-on-singapore-flagged-tanker-in-persian-gulf-reports/
More here: http://www.cnn.com/2015/05/14/politics/persian-gulf-iranian-boats-shots-fired/
Follow-up on this incident: http://www.marinelink.com/news/investigate-eternity391545.aspx