Reua Ekachai Heun Haaw is an escort barge of the true Royal Barges. It has a raised, backward-bent, gilded bow, that ends in an almost horizontal, kranok-shaped pinnacle.

The barge is 29.76 meters long and the outside hull is elaborately decorated with gilded lacquer, which at the front, below the bow, has what looks like the head of a makara (fig.). It is a twin of Reua Ekachai Laaw Thong and in processions they are used together (fig.) to accompany Reua Phra Thihnang Suphanahong (fig.), the King's personal barge.