The naval ensign of the Dominican Republic is same as the national flag, but typically flown with a ratio of 1:2. Randy Young, 10 March 2015
While doing some research online, I recently came across a photograph at http://www.skyscrapercity.com/showthread.php?t=1002979&page=58 that shows a number of US Army officers visiting the Dominican Republic and being shown some of the Navy's patrol vessels. The photograph provides a particularly good look at both the Dominican Republic naval ensign and the masthead pennant. The ensign in the photo looks similar to the one on FOTW, though with a darker shade of blue. Randy Young, 3 April 2016
When doing some research on some flags of the Dominican Republic, I came across some photographs of a wreath-laying ceremony by the Dominican Republic Navy. In the photographs, the Navy officers carry two flags: the Dominican Republic flag (with coat of arms) and the Navy jack. The Navy jack that they carry in the photos has a smaller central device than we have on FOTW. The diameter of the circle of stars is smaller, and the coat of arms in the center of the stars was even smaller. I don't know if this is a variant of the jack or if it's a truer reflection of how the jack actually appears. Randy Young, 18 February 2015
Photographs online of vessels flying the naval jack or the jack being carried in a ceremony or parade show that the naval jack in use today follows the same basic design as the previous one: the national coat of arms displayed on a white disc at the center of a blue field, with the disc surrounded by a ring of stars. The number of stars in the ring has changed, however, now at 31 stars, representing the 31 provinces (not counting the Distrito Nacional) that make up the Dominican Republic. The color of the field in the photographs that I've found online is always a darker blue than we have traditionally displayed at FOTW, and I noted that the stars now point outward instead of inward on the previous version of the jack.
At this point, I don't know exactly when the change in the number and orientation of the stars happened, though I assume that it was sometime after the creation of the Dominican Republic's newest province (San Josť de Ocoa, separated from Peravia) in 2002. Unfortunately, I have no official documentation to cite, only observations from photographs. And it appears that the jack variant that I had posted in February (with the smaller coat of arms and smaller diameter circle of stars) is the one actually being flown from Dominican naval and coast guard vessels. Randy Young, 22 May 2015
Album 2000 [pay00] shows a blue flag with white disk with the coat of arms surrounded with 17 white stars. The disk seems to be 2/3 of hoist and stars are given as pointing "inwards" towards the center of the disk. Željko Heimer, 16 June 2001
[kan56] gives only 12 stars; Gresham Carr's Flags of the World, 1956 [car56], gives 13; and both [bar65] (1965) and [c2b81] give (like [pie90]) 17. Mark Sensen, 11 April 1999
The Album 1995 [pie90] gives the jack as a white ensign with the national flag in canton (without arms) and yellow anchor in fly, which most sources show for the presidential flag, while it shows for the presidential flag what most sources show for the jack. Was it error in Album 1995?). Željko Heimer, 16 June 2001
In Znamierowski's Encyclopedia [zna99], p. 95, jack = national flag (sic!). Željko Heimer, 19 June 2001
According to [ped80], the jack is like the state flag. Mark Sensen, 11 April 1999
Album 2000 [pay00] shows a long triangular version of the national flag. Ratio approximatley (as measured from Album image) ≅2:31. Željko Heimer, 17 June 2001
While doing some research online, I recently came across a photograph at http://www.skyscrapercity.com/showthread.php?t=1002979&page=58 that shows a number of US Army officers visiting the Dominican Republic and being shown some of the Navy's patrol vessels. The photograph provides a particularly good look at both the Dominican Republic naval ensign and the masthead. The ensign in the photo looks similar to the one on FOTW, though with a darker shade of blue. The masthead pennant, though, looks a little different. While the basic design is the same (the national flag pattern in pennant form), the white cross appears to be centered on the pennant rather than shifted toward the hoist as we show on FOTW, and again the blue appears darker in the photograph than we show. I don't know if the design of the pennant officially changed between 2001 and 2009, but it appears that the centered cross was clearly in use in 2009. Randy Young, 3 April 2016
I recently came across the flag of the Dominican Republic's Naval Academy during a change of command ceremony.
I found the flag of the Dominican Republic Naval Academy on Wikipedia. I was skeptical of the graphic at the time, but the photographs I found seem to confirm it. The ceremony includes the use of the Dominican Republic national flag, the naval jack (with a truly tiny coat of arms in the center of a large white disc), and the academy flag.
The Dominican Republic Naval Academy flag features the academy's seal centered on a blue field. Randy Young, 11 March 2015
Album 2000 [pay00] shows a white flag with the coat of arms and with four blue stars, one in each corner of the flag. That is actually the same as the flag of the Secretary, with inverted colours. Željko Heimer, 16 June 2001